Vulnerability-Lookup

OPENSUSE-SU-2026:21502-1

Vulnerability from csaf_opensuse - Published: 2026-07-29 09:24 - Updated: 2026-09-17 17:40

Summary

Security update for nsd

Severity

Important

Notes

Title of the patch: Security update for nsd

Description of the patch: This update for nsd fixes the following issues: Changes in nsd: - Update nsd.keyring - update to 4.14.3: https://github.com/NLnetLabs/nsd/blob/NSD_4_14_3_REL/doc/ChangeLog * CVE-2026-12490: Bypass of client certificate verification with transfer over TLS (bsc#1269563) * CVE-2026-12246: Out of bounds stack write with crafted APL RR (bsc#1269564) * CVE-2026-12245: Denial of DNS over TLS service by any DoT client (bsc#1269565) * CVE-2026-12244: Heap overflow and crash with crafted SVCB RR (bsc#1269566) - update to 4.14.2: https://github.com/NLnetLabs/nsd/blob/NSD_4_14_2_REL/doc/ChangeLog - update to 4.14.1: https://github.com/NLnetLabs/nsd/blob/NSD_4_14_1_REL/doc/ChangeLog - update to 4.14.0: https://github.com/NLnetLabs/nsd/blob/NSD_4_14_0_REL/doc/ChangeLog - update to 4.13.0: https://github.com/NLnetLabs/nsd/blob/NSD_4_13_0_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_12_1_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_12_0_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_11_1_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_11_0_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_10_1_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_10_0_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_9_1_REL/doc/ChangeLog https://github.com/NLnetLabs/nsd/blob/NSD_4_9_0_REL/doc/ChangeLog - enable systemd notify support. - enable dnstap support. - enable tcp fast open support - enable support for >= 2038

Patchnames: openSUSE-Leap-16.0-packagehub-453

CVE-2026-12244

8.8 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:nsd-0:4.14.3-bp160.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:nsd-0:4.14.3-bp160.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:nsd-0:4.14.3-bp160.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:nsd-0:4.14.3-bp160.1.1.x86_64	—	Vendor Fix

Threats

Impact important

CVE-2026-12245

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-12244

Threats

Impact important

CVE-2026-12246

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected products

Recommended 4 products, the same list as for CVE-2026-12244

Threats

Impact important

CVE-2026-12490

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Recommended 4 products, the same list as for CVE-2026-12244

Threats

Impact important

References

18 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1269563	self
https://bugzilla.suse.com/1269564	self
https://bugzilla.suse.com/1269565	self
https://bugzilla.suse.com/1269566	self
https://www.suse.com/security/cve/CVE-2026-12244/	self
https://www.suse.com/security/cve/CVE-2026-12245/	self
https://www.suse.com/security/cve/CVE-2026-12246/	self
https://www.suse.com/security/cve/CVE-2026-12490/	self
https://www.suse.com/security/cve/CVE-2026-12244	external
https://bugzilla.suse.com/1269566	external
https://www.suse.com/security/cve/CVE-2026-12245	external
https://bugzilla.suse.com/1269565	external
https://www.suse.com/security/cve/CVE-2026-12246	external
https://bugzilla.suse.com/1269564	external
https://www.suse.com/security/cve/CVE-2026-12490	external
https://bugzilla.suse.com/1269563	external

JSON

To clipboard

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        "text": "This update for nsd fixes the following issues:\n\nChanges in nsd:\n\n- Update nsd.keyring\n\n- update to 4.14.3:\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_14_3_REL/doc/ChangeLog\n  * CVE-2026-12490: Bypass of client certificate verification with transfer over TLS (bsc#1269563)\n  * CVE-2026-12246: Out of bounds stack write with crafted APL RR (bsc#1269564)\n  * CVE-2026-12245: Denial of DNS over TLS service by any DoT client (bsc#1269565)\n  * CVE-2026-12244: Heap overflow and crash with crafted SVCB RR (bsc#1269566)\n- update to 4.14.2:\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_14_2_REL/doc/ChangeLog\n- update to 4.14.1:\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_14_1_REL/doc/ChangeLog\n- update to 4.14.0:\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_14_0_REL/doc/ChangeLog\n\n- update to 4.13.0:\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_13_0_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_12_1_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_12_0_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_11_1_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_11_0_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_10_1_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_10_0_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_9_1_REL/doc/ChangeLog\n  https://github.com/NLnetLabs/nsd/blob/NSD_4_9_0_REL/doc/ChangeLog\n- enable systemd notify support.\n- enable dnstap support.\n- enable tcp fast open support\n- enable support for \u003e= 2038\n",
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          "text": "If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let\u0027s an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size \u003e 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes",
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        {
          "category": "general",
          "text": "NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.",
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CVE-2026-12244 (GCVE-0-2026-12244)

Vulnerability from cvelistv5 – Published: 2026-06-25 05:24 – Updated: 2026-06-25 12:45

Title

Heap overflow and crash with crafted SVCB RR

Summary

If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-25 12:45 UTC

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-122 - Heap-based Buffer Overflow

Assigner

NLnet Labs

References

1 reference

URL	Tags
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-1…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
NLnet Labs	NSD	Affected: 4.14.0 , < 4.14.3 (semver)

Date Public

2026-06-25 00:00

Credits

Qifan Zhang from Palo Alto Networks

Show details on NVD website

JSON

To clipboard

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CVE-2026-12245 (GCVE-0-2026-12245)

Vulnerability from cvelistv5 – Published: 2026-06-25 05:24 – Updated: 2026-06-25 12:42

Title

Denial of DNS over TLS service by any DoT client

Summary

NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-25 12:42 UTC

CWE

CWE-416 - Use After Free

Assigner

NLnet Labs

References

1 reference

URL	Tags
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Impacted products

1 product

Vendor	Product	Version
NLnet Labs	NSD	Affected: 4.13.0 , < 4.14.3 (semver)

Date Public

2026-06-25 00:00

Credits

Qifan Zhang from Palo Alto Networks

Show details on NVD website

JSON

To clipboard

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CVE-2026-12246 (GCVE-0-2026-12246)

Vulnerability from cvelistv5 – Published: 2026-06-25 05:24 – Updated: 2026-06-25 12:42

Title

Out of bounds stack write with crafted APL RR

Summary

NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.

Severity

7.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-25 12:41 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input
CWE-20 - Improper Input Validation

Assigner

NLnet Labs

References

1 reference

URL	Tags
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-1…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
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Date Public

2026-06-25 00:00

Credits

Qifan Zhang from Palo Alto Networks Haruki Oyama from Waseda University zhangph

Show details on NVD website

JSON

To clipboard

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    "assignerShortName": "NLnet Labs",
    "cveId": "CVE-2026-12246",
    "datePublished": "2026-06-25T05:24:29.512Z",
    "dateReserved": "2026-06-15T06:47:44.761Z",
    "dateUpdated": "2026-06-25T12:42:05.428Z",
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CVE-2026-12490 (GCVE-0-2026-12490)

Vulnerability from cvelistv5 – Published: 2026-06-25 05:24 – Updated: 2026-06-25 12:41

Title

Bypass of client certificate verification with transfer over TLS

Summary

When a provide-xfr is given with a tls-auth-name, a secondary requesting a transfer should provide a client certificate with that name. However, no client certificate is needed when the request comes in over TLS over the regular tls-port (and not the tls-auth-port) or over over TCP over the regular port, when the other conditions of the provide-xfr rule match.

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-25 12:40 UTC

CWE

CWE-306 - Missing Authentication for Critical Function
CWE-284 - Improper Access Control

Assigner

NLnet Labs

References

1 reference

URL	Tags
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-1…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
NLnet Labs	NSD	Affected: 4.10.1 , < 4.14.3 (semver)

Date Public

2026-06-25 00:00

Credits

Qifan Zhang from Palo Alto Networks

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OPENSUSE-SU-2026:21502-1

CVE-2026-12244 (GCVE-0-2026-12244)

CVE-2026-12245 (GCVE-0-2026-12245)

CVE-2026-12246 (GCVE-0-2026-12246)

CVE-2026-12490 (GCVE-0-2026-12490)

Tags

Sightings

Nomenclature

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