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868 vulnerabilities by Openbsd
GCVE-1988-2026-0362
Vulnerability from gna-1988 – Published: 2026-09-11 07:55 – Updated: 2026-09-11 11:31
VLAI
EPSS
VEX
Title
OpenBSD sppp_pap_input: PAP authentication bypass
Summary
------------------------------------------------------------------------
OpenBSD sppp_pap_input: PAP Authentication Bypass via Zero-Length bcmp
------------------------------------------------------------------------
Affected: OpenBSD all versions through 7.6 (fixed in -current)
Vendor: OpenBSD
Severity: High
Reporter: Argus
Date: 2026-06-16
1. SUMMARY
==========
The sppp_pap_input() function in sys/net/if_spppsubr.c uses the
attacker-controlled name_len and passwd_len fields from the incoming
PAP frame directly as the comparison length for bcmp() against
configured credentials.
When both fields are set to zero, bcmp() returns 0 unconditionally
(bcmp with length 0 always succeeds). The existing upper-bound guard
(> AUTHMAXLEN) allows zero through. As a result, a PAP Auth-Request
with name_len=0 and passwd_len=0 passes credential validation and
triggers a PAP_ACK, authenticating the peer without any knowledge of
the configured username or password.
A secondary kernel heap over-read exists via the same root cause:
supplying a name_len larger than the allocation of the stored
credential causes bcmp to read past the heap object.
2. AFFECTED VERSIONS
====================
The bcmp comparison pattern was introduced with the original sppp
code import on 1999-07-01 (commit bda3414e, "lmc driver; ported by
chris () dqc org"). The zero-length bypass has been exploitable since
that date.
In February 2009 (commit 9c2f3d605fc), auth credential fields were
changed from fixed-size struct arrays to dynamically allocated
malloc(strlen()+1), and the bounds check was changed to
> AUTHMAXLEN (256). This decoupled the allocation size from the
comparison bound, enabling the heap over-read.
Confirmed against OpenBSD 7.6 (amd64) in QEMU/KVM.
3. DETAILS
==========
Vulnerable code (sys/net/if_spppsubr.c, sppp_pap_input):
if (name_len > AUTHMAXLEN ||
passwd_len > AUTHMAXLEN ||
bcmp(name, sp->hisauth.name, name_len) != 0 ||
bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
/* authentication failed */
name_len and passwd_len are parsed directly from the PAP frame
payload. bcmp(a, b, 0) always returns 0. The > AUTHMAXLEN guard
rejects values above 255 but permits zero.
The CHAP handler in the same file already had the correct pattern
with an exact-length pre-check:
if (name_len != strlen(sp->hisauth.name)
|| bcmp(name, sp->hisauth.name, name_len) != 0) {
The PAP handler never received the same treatment.
4. REACHABILITY
===============
Both bugs are reachable via the PPPoE data path:
pppoe_data_input -> pppoeintr -> sppp_input -> sppp_pap_input
Precondition: the target system must be configured as a PAP
authenticator (e.g. ifconfig pppoe0 peerproto pap peername <x>
peerkey <y>). The attacker does not need to know any credentials.
5. IMPACT
=========
An attacker on the same network segment can authenticate to a PPPoE
interface without credentials, establishing a full network-layer
link (LCP -> PAP -> IPCP -> IP).
When OpenBSD acts as a PPPoE client with mutual authentication, a
rogue server in the same broadcast domain can exploit the bypass to
impersonate a legitimate server, causing OpenBSD to route traffic
through the attacker's endpoint.
6. PROOF OF CONCEPT
===================
A Python PoC acts as a PPPoE server, completes discovery and
LCP negotiation, then sends a PAP Auth-Request with name_len=0 and
passwd_len=0.
Result:
PAP_ACK received with empty credentials
VM accepted name_len=0, passwd_len=0 as valid auth.
IPCP Config-Ack received - link is UP
ICMP echo reply from 10.0.0.1
FULL LINK ESTABLISHED
PoC and full technical report:
https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html
7. FIX
======
Fixed in -current by mvs on 2026-06-14. The fix mirrors the CHAP
handler's exact-length pre-check:
if (name_len != strlen(sp->hisauth.name) ||
passwd_len != strlen(sp->hisauth.secret) ||
bcmp(name, sp->hisauth.name, name_len) != 0 ||
bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
Fix commit:
https://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8
8. TIMELINE
===========
2026-06-12 Reported to security () openbsd org with PoC
2026-06-14 Fix committed to -current
9. CREDIT
=========
Discovered and reported by Argus (https://byteray.co.uk/).
10. REFERENCES
==============
Advisory:
https://pop.argus-systems.ai/advisory/adv-038.html
Blog post:
https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html
Proof of concept:
https://pop.argus-systems.ai/attachments/poc-001-pap-bypass.py
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
9 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Openbsd | sppp_pap_input PAP |
Affected:
unknown
|
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"value": "------------------------------------------------------------------------\nOpenBSD sppp_pap_input: PAP Authentication Bypass via Zero-Length bcmp\n------------------------------------------------------------------------\n\nAffected:\u00a0 OpenBSD all versions through 7.6 (fixed in -current)\nVendor:\u00a0 \u00a0 OpenBSD\nSeverity:\u00a0 High\nReporter:\u00a0 Argus\nDate:\u00a0 \u00a0 \u00a0 2026-06-16\n\n\n1. SUMMARY\n==========\n\nThe sppp_pap_input() function in sys/net/if_spppsubr.c uses the\nattacker-controlled name_len and passwd_len fields from the incoming\nPAP frame directly as the comparison length for bcmp() against\nconfigured credentials.\n\nWhen both fields are set to zero, bcmp() returns 0 unconditionally\n(bcmp with length 0 always succeeds). The existing upper-bound guard\n(\u003e AUTHMAXLEN) allows zero through. As a result, a PAP Auth-Request\nwith name_len=0 and passwd_len=0 passes credential validation and\ntriggers a PAP_ACK, authenticating the peer without any knowledge of\nthe configured username or password.\n\nA secondary kernel heap over-read exists via the same root cause:\nsupplying a name_len larger than the allocation of the stored\ncredential causes bcmp to read past the heap object.\n\n\n2. AFFECTED VERSIONS\n====================\n\nThe bcmp comparison pattern was introduced with the original sppp\ncode import on 1999-07-01 (commit bda3414e, \"lmc driver; ported by\nchris () dqc org\"). The zero-length bypass has been exploitable since\nthat date.\n\nIn February 2009 (commit 9c2f3d605fc), auth credential fields were\nchanged from fixed-size struct arrays to dynamically allocated\nmalloc(strlen()+1), and the bounds check was changed to\n\u003e AUTHMAXLEN (256). This decoupled the allocation size from the\ncomparison bound, enabling the heap over-read.\n\nConfirmed against OpenBSD 7.6 (amd64) in QEMU/KVM.\n\n\n3. DETAILS\n==========\n\nVulnerable code (sys/net/if_spppsubr.c, sppp_pap_input):\n\n\u00a0 if (name_len \u003e AUTHMAXLEN ||\n\u00a0 \u00a0 \u00a0 passwd_len \u003e AUTHMAXLEN ||\n\u00a0 \u00a0 \u00a0 bcmp(name, sp-\u003ehisauth.name, name_len) != 0 ||\n\u00a0 \u00a0 \u00a0 bcmp(passwd, sp-\u003ehisauth.secret, passwd_len) != 0) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 /* authentication failed */\n\nname_len and passwd_len are parsed directly from the PAP frame\npayload. bcmp(a, b, 0) always returns 0. The \u003e AUTHMAXLEN guard\nrejects values above 255 but permits zero.\n\nThe CHAP handler in the same file already had the correct pattern\nwith an exact-length pre-check:\n\n\u00a0 if (name_len != strlen(sp-\u003ehisauth.name)\n\u00a0 \u00a0 \u00a0 || bcmp(name, sp-\u003ehisauth.name, name_len) != 0) {\n\nThe PAP handler never received the same treatment.\n\n\n4. REACHABILITY\n===============\n\nBoth bugs are reachable via the PPPoE data path:\n\n\u00a0 pppoe_data_input -\u003e pppoeintr -\u003e sppp_input -\u003e sppp_pap_input\n\nPrecondition: the target system must be configured as a PAP\nauthenticator (e.g. ifconfig pppoe0 peerproto pap peername \u003cx\u003e\npeerkey \u003cy\u003e). The attacker does not need to know any credentials.\n\n\n5. IMPACT\n=========\n\nAn attacker on the same network segment can authenticate to a PPPoE\ninterface without credentials, establishing a full network-layer\nlink (LCP -\u003e PAP -\u003e IPCP -\u003e IP).\n\nWhen OpenBSD acts as a PPPoE client with mutual authentication, a\nrogue server in the same broadcast domain can exploit the bypass to\nimpersonate a legitimate server, causing OpenBSD to route traffic\nthrough the attacker\u0027s endpoint.\n\n\n6. PROOF OF CONCEPT\n===================\n\nA Python PoC acts as a PPPoE server, completes discovery and\nLCP negotiation, then sends a PAP Auth-Request with name_len=0 and\npasswd_len=0.\n\nResult:\n\n\u00a0 PAP_ACK received with empty credentials\n\u00a0 VM accepted name_len=0, passwd_len=0 as valid auth.\n\n\u00a0 IPCP Config-Ack received - link is UP\n\u00a0 ICMP echo reply from 10.0.0.1\n\n\u00a0 FULL LINK ESTABLISHED\n\nPoC and full technical report:\n\u00a0\u00a0https://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html\n\n\n7. FIX\n======\n\nFixed in -current by mvs on 2026-06-14. The fix mirrors the CHAP\nhandler\u0027s exact-length pre-check:\n\n\u00a0 if (name_len != strlen(sp-\u003ehisauth.name) ||\n\u00a0 \u00a0 \u00a0 passwd_len != strlen(sp-\u003ehisauth.secret) ||\n\u00a0 \u00a0 \u00a0 bcmp(name, sp-\u003ehisauth.name, name_len) != 0 ||\n\u00a0 \u00a0 \u00a0 bcmp(passwd, sp-\u003ehisauth.secret, passwd_len) != 0) {\n\nFix commit:\nhttps://github.com/openbsd/src/commit/076e2b1c1fc4ac0883a72d3544131ad5cee7adf8\n\n\n8. TIMELINE\n===========\n\n\u00a0 2026-06-12\u00a0 Reported to security () openbsd org with PoC\n\u00a0 2026-06-14\u00a0 Fix committed to -current\n\n\n9. CREDIT\n=========\n\nDiscovered and reported by Argus (https://byteray.co.uk/).\n\n\n10. REFERENCES\n==============\n\nAdvisory:\n\u00a0 https://pop.argus-systems.ai/advisory/adv-038.html\n\nBlog post:\nhttps://blog.argus-systems.ai/blog/openbsd-pap-27-year-auth-bypass.html\n\nProof of concept:\n\u00a0 https://pop.argus-systems.ai/attachments/poc-001-pap-bypass.py\n\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
}
],
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"title": "OpenBSD sppp_pap_input: PAP authentication bypass",
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GCVE-1988-2026-0320
Vulnerability from gna-1988 – Published: 2026-09-11 07:55 – Updated: 2026-09-11 11:31
VLAI
EPSS
VEX
Title
OpenBSD mpls_do_error: Remote Kernel Stack Disclosure via MPLS Label Stack Over-read
Summary
------------------------------------------------------------------------
------------------------------------------------------------------------
Affected: OpenBSD -current prior to 2026-06-18 (fixed in -current)
Vendor: OpenBSD
Severity: Medium
Reporter: Argus Systems
Date: 2026-06-12
CVE: CVE-2026-56099
1. SUMMARY
==========
The mpls_do_error() function in sys/netmpls/mpls_input.c parses an
incoming MPLS label stack into a fixed-size local array,
struct shim_hdr stack[MPLS_INKERNEL_LOOP_MAX] (16 entries). When the
parse loop completes without encountering the Bottom-of-Stack (BoS)
label, nstk reaches MPLS_INKERNEL_LOOP_MAX (16). Several subsequent
code paths then compute a copy length of (nstk + 1) * sizeof(*shim)
-- 17 entries -- and use it with icmp_do_exthdr(), M_PREPEND(), and
m_copyback() against the 16-entry stack object. This reads one
struct shim_hdr (4 bytes) past the end of the array, and that data is
reflected back to the sender inside the generated ICMP/MPLS error
response.
2. AFFECTED VERSIONS
====================
The (nstk + 1) length computations against the 16-entry stack[] array
were introduced with the ICMP/MPLS error path on 2010-09-13 (commit
201d6983add, "First shot at ICMP error handling inside an MPLS path.
Currently only TTL exceeded errors for IPv4 are handled."). The parse
loop was bounded by MPLS_INKERNEL_LOOP_MAX (16), but nothing rejected
a stack that ran to completion without a BoS bit, so nstk could reach
16 and the subsequent (nstk + 1) reads accessed stack[16].
Affected: OpenBSD -current prior to 2026-06-18 (mpls_input.c pre
v1.82).
3. DETAILS
==========
Vulnerable code (sys/netmpls/mpls_input.c, mpls_do_error):
struct shim_hdr stack[MPLS_INKERNEL_LOOP_MAX]; /* 16 entries */
...
for (nstk = 0; nstk < MPLS_INKERNEL_LOOP_MAX; nstk++) {
...
stack[nstk] = *mtod(m, struct shim_hdr *);
m_adj(m, sizeof(*shim));
if (MPLS_BOS_ISSET(stack[nstk].shim_label))
break;
}
/* no guard: with no BoS bit set, nstk == 16 here */
shim = &stack[0];
...
case IPVERSION:
...
if (icmp_do_exthdr(m, ICMP_EXT_MPLS, 1, stack,
(nstk + 1) * sizeof(*shim)))
return (NULL);
...
MPLS_INKERNEL_LOOP_MAX is defined as 16 and sizeof(struct shim_hdr) is
4. With nstk == 16, each of these copies 17 * 4 = 68 bytes from a
64-byte stack[] object, reading stack[16] -- one struct shim_hdr (4
bytes) of adjacent kernel stack -- and including it in the response.
The same (nstk + 1) length is later used to prepend and m_copyback()
the stack back onto the reflected packet:
M_PREPEND(m, (nstk + 1) * sizeof(*shim), M_NOWAIT);
...
m_copyback(m, 0, (nstk + 1) * sizeof(*shim), stack, M_NOWAIT);
so the leaked entry also travels on the wire as the 17th MPLS shim
header of the returned frame.
4. REACHABILITY
===============
The path is reachable remotely via mpls_input() -> mpls_do_error() on
systems that have MPLS enabled on an interface. The trigger is a
crafted MPLS frame (EtherType 0x8847) carrying 16 labels with no BoS
bit set and an outermost label TTL of 1, so the TTL-exceeded error
path is taken:
mpls_input (ttl <= 1)
-> mpls_do_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0)
The inner payload must be IPv4 so the IPVERSION branch is reached.
5. IMPACT
=========
Each crafted packet leaks 4 bytes of kernel stack memory adjacent to
the stack[] array. The leak is carried in the ICMP/MPLS extension
object of the error response reflected back to the sender, so an
attacker can harvest the leaked bytes.
6. PROOF OF CONCEPT
===================
A Python/Scapy PoC sends a 16-label MPLS frame with no BoS bit set
and an outermost label TTL of 1, then captures the reply. On a
vulnerable kernel the reply carries 17 MPLS shim headers on the wire;
the 17th (stack[16]) is the leaked kernel stack data.
PoC:
https://pop.argus-systems.ai/attachments/poc-008-mpls-stack-leak.py
7. FIX
======
Fixed in -current by mvs on 2026-06-18. The fix adds a guard that
drops a label stack which runs to completion without a BoS bit, so
nstk can no longer reach MPLS_INKERNEL_LOOP_MAX:
if (nstk >= MPLS_INKERNEL_LOOP_MAX) {
m_freem(m);
return (NULL);
}
Fix commit (mpls_input.c v1.82):
https://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfd
8. TIMELINE
===========
2026-06-12 Reported to security () openbsd org with PoC
2026-06-18 Fix committed to -current
9. CREDIT
=========
Discovered and reported by Argus Systems (https://byteray.co.uk/).
10. REFERENCES
==============
Advisory:
https://pop.argus-systems.ai/advisory/adv-040.html
Proof of concept:
https://pop.argus-systems.ai/attachments/poc-008-mpls-stack-leak.py
Fix commit:
https://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfd
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Openbsd | mpls_do_error |
Affected:
unknown
|
Relationships
analysis
GCVE-1988-2026-0320 (this record)
- related CVE-2026-56099
{
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"value": "------------------------------------------------------------------------\n\n------------------------------------------------------------------------\n\nAffected:\u00a0 OpenBSD -current prior to 2026-06-18 (fixed in -current)\nVendor:\u00a0 \u00a0 OpenBSD\nSeverity:\u00a0 Medium\nReporter:\u00a0 Argus Systems\nDate:\u00a0 \u00a0 \u00a0 2026-06-12\nCVE:\u00a0 \u00a0 \u00a0 \u00a0CVE-2026-56099\n\n\n1. SUMMARY\n==========\n\nThe mpls_do_error() function in sys/netmpls/mpls_input.c parses an\nincoming MPLS label stack into a fixed-size local array,\nstruct shim_hdr stack[MPLS_INKERNEL_LOOP_MAX] (16 entries). When the\nparse loop completes without encountering the Bottom-of-Stack (BoS)\nlabel, nstk reaches MPLS_INKERNEL_LOOP_MAX (16). Several subsequent\ncode paths then compute a copy length of (nstk + 1) * sizeof(*shim)\n-- 17 entries -- and use it with icmp_do_exthdr(), M_PREPEND(), and\nm_copyback() against the 16-entry stack object. This reads one\nstruct shim_hdr (4 bytes) past the end of the array, and that data is\nreflected back to the sender inside the generated ICMP/MPLS error\nresponse.\n\n\n2. AFFECTED VERSIONS\n====================\n\nThe (nstk + 1) length computations against the 16-entry stack[] array\nwere introduced with the ICMP/MPLS error path on 2010-09-13 (commit\n201d6983add, \"First shot at ICMP error handling inside an MPLS path.\nCurrently only TTL exceeded errors for IPv4 are handled.\"). The parse\nloop was bounded by MPLS_INKERNEL_LOOP_MAX (16), but nothing rejected\na stack that ran to completion without a BoS bit, so nstk could reach\n16 and the subsequent (nstk + 1) reads accessed stack[16].\n\nAffected: OpenBSD -current prior to 2026-06-18 (mpls_input.c pre\nv1.82).\n\n\n3. DETAILS\n==========\n\nVulnerable code (sys/netmpls/mpls_input.c, mpls_do_error):\n\n\u00a0 struct shim_hdr stack[MPLS_INKERNEL_LOOP_MAX];\u00a0 \u00a0/* 16 entries */\n\u00a0 ...\n\u00a0 for (nstk = 0; nstk \u003c MPLS_INKERNEL_LOOP_MAX; nstk++) {\n\u00a0 \u00a0 \u00a0 ...\n\u00a0 \u00a0 \u00a0 stack[nstk] = *mtod(m, struct shim_hdr *);\n\u00a0 \u00a0 \u00a0 m_adj(m, sizeof(*shim));\n\u00a0 \u00a0 \u00a0 if (MPLS_BOS_ISSET(stack[nstk].shim_label))\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;\n\u00a0 }\n\u00a0 /* no guard: with no BoS bit set, nstk == 16 here */\n\n\u00a0 shim = \u0026stack[0];\n\u00a0 ...\n\u00a0 case IPVERSION:\n\u00a0 \u00a0 \u00a0 ...\n\u00a0 \u00a0 \u00a0 if (icmp_do_exthdr(m, ICMP_EXT_MPLS, 1, stack,\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 (nstk + 1) * sizeof(*shim)))\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return (NULL);\n\u00a0 \u00a0 \u00a0 ...\n\nMPLS_INKERNEL_LOOP_MAX is defined as 16 and sizeof(struct shim_hdr) is\n4. With nstk == 16, each of these copies 17 * 4 = 68 bytes from a\n64-byte stack[] object, reading stack[16] -- one struct shim_hdr (4\nbytes) of adjacent kernel stack -- and including it in the response.\n\nThe same (nstk + 1) length is later used to prepend and m_copyback()\nthe stack back onto the reflected packet:\n\n\u00a0 M_PREPEND(m, (nstk + 1) * sizeof(*shim), M_NOWAIT);\n\u00a0 ...\n\u00a0 m_copyback(m, 0, (nstk + 1) * sizeof(*shim), stack, M_NOWAIT);\n\nso the leaked entry also travels on the wire as the 17th MPLS shim\nheader of the returned frame.\n\n\n4. REACHABILITY\n===============\n\nThe path is reachable remotely via mpls_input() -\u003e mpls_do_error() on\nsystems that have MPLS enabled on an interface. The trigger is a\ncrafted MPLS frame (EtherType 0x8847) carrying 16 labels with no BoS\nbit set and an outermost label TTL of 1, so the TTL-exceeded error\npath is taken:\n\n\u00a0 mpls_input\u00a0 (ttl \u003c= 1)\n\u00a0 \u00a0 -\u003e mpls_do_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0)\n\nThe inner payload must be IPv4 so the IPVERSION branch is reached.\n\n\n5. IMPACT\n=========\n\nEach crafted packet leaks 4 bytes of kernel stack memory adjacent to\nthe stack[] array. The leak is carried in the ICMP/MPLS extension\nobject of the error response reflected back to the sender, so an\nattacker can harvest the leaked bytes.\n\n\n6. PROOF OF CONCEPT\n===================\n\nA Python/Scapy PoC sends a 16-label MPLS frame with no BoS bit set\nand an outermost label TTL of 1, then captures the reply. On a\nvulnerable kernel the reply carries 17 MPLS shim headers on the wire;\nthe 17th (stack[16]) is the leaked kernel stack data.\n\nPoC:\nhttps://pop.argus-systems.ai/attachments/poc-008-mpls-stack-leak.py\n\n\n7. FIX\n======\n\nFixed in -current by mvs on 2026-06-18. The fix adds a guard that\ndrops a label stack which runs to completion without a BoS bit, so\nnstk can no longer reach MPLS_INKERNEL_LOOP_MAX:\n\n\u00a0 if (nstk \u003e= MPLS_INKERNEL_LOOP_MAX) {\n\u00a0 \u00a0 \u00a0 m_freem(m);\n\u00a0 \u00a0 \u00a0 return (NULL);\n\u00a0 }\n\nFix commit (mpls_input.c v1.82):\nhttps://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfd\n\n\n8. TIMELINE\n===========\n\n\u00a0 2026-06-12\u00a0 Reported to security () openbsd org with PoC\n\u00a0 2026-06-18\u00a0 Fix committed to -current\n\n\n9. CREDIT\n=========\n\nDiscovered and reported by Argus Systems (https://byteray.co.uk/).\n\n\n10. REFERENCES\n==============\n\nAdvisory:\n\u00a0 https://pop.argus-systems.ai/advisory/adv-040.html\n\nProof of concept:\nhttps://pop.argus-systems.ai/attachments/poc-008-mpls-stack-leak.py\n\nFix commit:\nhttps://github.com/openbsd/src/commit/6a23123ec05f1eb29cfcaae0f3a468b2e1983cfd\n\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
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CVE-2026-56101 (GCVE-0-2026-56101)
Vulnerability from nvd – Published: 2026-09-08 16:00 – Updated: 2026-09-10 15:02 X_Open Source
VLAI
EPSS
VEX
Title
OpenBSD ieee80211_crypto_tkip.c TKIP MIC Countermeasure Logic Inversion DoS
Summary
OpenBSD before commit 1ee99df contains an inverted comparison vulnerability in the ieee80211_michael_mic_failure() function within sys/net80211/ieee80211_crypto_tkip.c that allows unauthenticated attackers within RF range to trigger denial of service by sending two malformed TKIP frames separated by more than 60 seconds. Attackers can exploit the reversed TKIP MIC failure countermeasure window check to deauthenticate all associated TKIP stations and block reassociation for up to 90 seconds, while within-window MIC failures that should engage countermeasures are silently discarded, leaving key-recovery attempts undetected.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 13:49 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://pop.argus-systems.ai/advisory/adv-209.html | technical-descriptionexploit |
| https://github.com/openbsd/src/commit/1ee99dfcc4d… | patch |
| https://www.vulncheck.com/advisories/openbsd-ieee… | third-party-advisory |
Impacted products
Date Public
2026-07-15 00:00
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CVE-2026-73283 (GCVE-0-2026-73283)
Vulnerability from nvd – Published: 2026-08-11 19:15 – Updated: 2026-08-11 20:16
VLAI
EPSS
VEX
Summary
In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:16 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
Impacted products
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CVE-2026-73282 (GCVE-0-2026-73282)
Vulnerability from nvd – Published: 2026-08-11 19:12 – Updated: 2026-08-11 20:17
VLAI
EPSS
VEX
Summary
In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:17 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
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CVE-2026-73281 (GCVE-0-2026-73281)
Vulnerability from nvd – Published: 2026-08-11 19:10 – Updated: 2026-08-11 20:16
VLAI
EPSS
VEX
Summary
In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that add tokens or use keys. This is caused by misinteraction between agent locking and the session-bind@openssh.com extension.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:16 UTC
CWE
- CWE-669 - Incorrect Resource Transfer Between Spheres
Assigner
References
1 reference
Impacted products
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CVE-2026-60002 (GCVE-0-2026-60002)
Vulnerability from nvd – Published: 2026-07-08 00:17 – Updated: 2026-07-08 13:02
VLAI
EPSS
VEX
Summary
ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:01 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
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CVE-2026-60001 (GCVE-0-2026-60001)
Vulnerability from nvd – Published: 2026-07-08 00:16 – Updated: 2026-07-08 13:03
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:03 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
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CVE-2026-60000 (GCVE-0-2026-60000)
Vulnerability from nvd – Published: 2026-07-08 00:14 – Updated: 2026-07-08 13:06
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:06 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
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CVE-2026-59999 (GCVE-0-2026-59999)
Vulnerability from nvd – Published: 2026-07-08 00:13 – Updated: 2026-07-08 13:07
VLAI
EPSS
VEX
Summary
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:07 UTC
CWE
- CWE-348 - Use of Less Trusted Source
Assigner
References
Impacted products
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CVE-2026-59998 (GCVE-0-2026-59998)
Vulnerability from nvd – Published: 2026-07-08 00:11 – Updated: 2026-07-08 13:48
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:47 UTC
CWE
- CWE-573 - Improper Following of Specification by Caller
Assigner
References
Impacted products
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CVE-2026-59997 (GCVE-0-2026-59997)
Vulnerability from nvd – Published: 2026-07-08 00:09 – Updated: 2026-07-08 12:52
VLAI
EPSS
VEX
Summary
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:52 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
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CVE-2026-59996 (GCVE-0-2026-59996)
Vulnerability from nvd – Published: 2026-07-08 00:07 – Updated: 2026-07-08 13:03
VLAI
EPSS
VEX
Summary
scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:03 UTC
CWE
- CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
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CVE-2026-59995 (GCVE-0-2026-59995)
Vulnerability from nvd – Published: 2026-07-08 00:04 – Updated: 2026-07-08 12:52
VLAI
EPSS
VEX
Summary
sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:52 UTC
CWE
- CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
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CVE-2026-57589 (GCVE-0-2026-57589)
Vulnerability from nvd – Published: 2026-06-25 00:33 – Updated: 2026-06-26 03:55
VLAI
EPSS
VEX
Summary
sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
Impacted products
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CVE-2026-55655 (GCVE-0-2026-55655)
Vulnerability from nvd – Published: 2026-06-23 03:36 – Updated: 2026-09-01 08:40
VLAI
EPSS
VEX
Title
Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions
Summary
A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow some manipulation of the forwarded session.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 12:21 UTC
CWE
- CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:36759 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:47755 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:47756 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:47757 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:54387 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:58981 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-55655 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2462250 | issue-trackingx_refsource_REDHAT |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:9.9p1-25.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:8.0p1-30.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream cpe:/o:redhat:enterprise_linux:8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:9.9p1-9.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
10.3p1-6.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786435483 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786533529 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787135742 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787241260 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-06-22 23:22
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CVE-2026-55654 (GCVE-0-2026-55654)
Vulnerability from nvd – Published: 2026-06-23 03:37 – Updated: 2026-09-01 08:52
VLAI
EPSS
VEX
Title
Openssh: heap out-of-bounds read in red hat enterprise linux versions of openssh gssapi indicator cleanup due to missing null sentinel termination
Summary
A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of GSSAPI (Generic Security Service Application Programming Interface) indicators when a trailing NULL termination is missing in the auth-indicators array. A remote attacker, under specific configurations involving GSSAPI authentication and a Kerberos environment, could exploit this to cause the SSH authentication path to crash or abort. This leads to a denial of service (DoS), impacting the availability of the SSH service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 12:11 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:36759 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:47756 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:47757 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:54387 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:58981 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-55654 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2462493 | issue-trackingx_refsource_REDHAT |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:9.9p1-25.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:9.9p1-9.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
10.3p1-6.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786435483 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786533529 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787135742 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787241260 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-06-22 23:18
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CVE-2026-56101 (GCVE-0-2026-56101)
Vulnerability from cvelistv5 – Published: 2026-09-08 16:00 – Updated: 2026-09-10 15:02 X_Open Source
VLAI
EPSS
VEX
Title
OpenBSD ieee80211_crypto_tkip.c TKIP MIC Countermeasure Logic Inversion DoS
Summary
OpenBSD before commit 1ee99df contains an inverted comparison vulnerability in the ieee80211_michael_mic_failure() function within sys/net80211/ieee80211_crypto_tkip.c that allows unauthenticated attackers within RF range to trigger denial of service by sending two malformed TKIP frames separated by more than 60 seconds. Attackers can exploit the reversed TKIP MIC failure countermeasure window check to deauthenticate all associated TKIP stations and block reassociation for up to 90 seconds, while within-window MIC failures that should engage countermeasures are silently discarded, leaving key-recovery attempts undetected.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 13:49 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://pop.argus-systems.ai/advisory/adv-209.html | technical-descriptionexploit |
| https://github.com/openbsd/src/commit/1ee99dfcc4d… | patch |
| https://www.vulncheck.com/advisories/openbsd-ieee… | third-party-advisory |
Impacted products
Date Public
2026-07-15 00:00
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CVE-2026-73283 (GCVE-0-2026-73283)
Vulnerability from cvelistv5 – Published: 2026-08-11 19:15 – Updated: 2026-08-11 20:16
VLAI
EPSS
VEX
Summary
In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:16 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
Impacted products
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CVE-2026-73282 (GCVE-0-2026-73282)
Vulnerability from cvelistv5 – Published: 2026-08-11 19:12 – Updated: 2026-08-11 20:17
VLAI
EPSS
VEX
Summary
In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:17 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
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CVE-2026-73281 (GCVE-0-2026-73281)
Vulnerability from cvelistv5 – Published: 2026-08-11 19:10 – Updated: 2026-08-11 20:16
VLAI
EPSS
VEX
Summary
In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that add tokens or use keys. This is caused by misinteraction between agent locking and the session-bind@openssh.com extension.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:16 UTC
CWE
- CWE-669 - Incorrect Resource Transfer Between Spheres
Assigner
References
1 reference
Impacted products
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CVE-2026-60002 (GCVE-0-2026-60002)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:17 – Updated: 2026-07-08 13:02
VLAI
EPSS
VEX
Summary
ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:01 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
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CVE-2026-60001 (GCVE-0-2026-60001)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:16 – Updated: 2026-07-08 13:03
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:03 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
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CVE-2026-60000 (GCVE-0-2026-60000)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:14 – Updated: 2026-07-08 13:06
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:06 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
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CVE-2026-59999 (GCVE-0-2026-59999)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:13 – Updated: 2026-07-08 13:07
VLAI
EPSS
VEX
Summary
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:07 UTC
CWE
- CWE-348 - Use of Less Trusted Source
Assigner
References
Impacted products
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CVE-2026-59998 (GCVE-0-2026-59998)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:11 – Updated: 2026-07-08 13:48
VLAI
EPSS
VEX
Summary
sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:47 UTC
CWE
- CWE-573 - Improper Following of Specification by Caller
Assigner
References
Impacted products
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CVE-2026-59997 (GCVE-0-2026-59997)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:09 – Updated: 2026-07-08 12:52
VLAI
EPSS
VEX
Summary
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:52 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
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CVE-2026-59996 (GCVE-0-2026-59996)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:07 – Updated: 2026-07-08 13:03
VLAI
EPSS
VEX
Summary
scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 13:03 UTC
CWE
- CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
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CVE-2026-59995 (GCVE-0-2026-59995)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:04 – Updated: 2026-07-08 12:52
VLAI
EPSS
VEX
Summary
sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:52 UTC
CWE
- CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
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CVE-2026-57589 (GCVE-0-2026-57589)
Vulnerability from cvelistv5 – Published: 2026-06-25 00:33 – Updated: 2026-06-26 03:55
VLAI
EPSS
VEX
Summary
sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
Impacted products
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