Vulnerability-Lookup

SUSE-SU-2026:23830-1

Vulnerability from csaf_suse - Published: 2026-09-14 10:17 - Updated: 2026-09-27 11:05

Summary

Security update for glibc

Severity

Moderate

Notes

Title of the patch: Security update for glibc

Description of the patch: This update for glibc fixes the following issues: - CVE-2026-6368: invalid free via wordexp WRDE_APPEND rollback (bsc#1274726). - CVE-2026-6791: stack overflow in wordexp tilde expansion (bsc#1274723). - CVE-2026-18374: heap buffer overflow in the fopen ccs extension (bsc#1277262). - CVE-2026-19499: buffer overflow in strfmon right-justification padding (bsc#1276892). - CVE-2026-19542: out-of-bounds array write in tdelete (bsc#1276946). - CVE-2026-77117: SHIFT_JISX0213 decoding lacks pending character reset (bsc#1277921). - CVE-2026-80489: EUC_JISX0213 decoding lacks pending character reset (bsc#1277922).

Patchnames: SUSE-SLE-Micro-6.0-897

CVE-2026-18374

4.9 (Medium)


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

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.0:glibc-0:2.38-15.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-0:2.38-15.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-0:2.38-15.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-devel-0:2.38-15.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-devel-0:2.38-15.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-devel-0:2.38-15.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-0:2.38-15.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-0:2.38-15.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-0:2.38-15.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-base-0:2.38-15.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-base-0:2.38-15.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:glibc-locale-base-0:2.38-15.1.x86_64	—	Vendor Fix

Threats

Impact moderate

CVE-2026-19499

6.1 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

CVE-2026-19542

4.2 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

CVE-2026-6368

6.6 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

CVE-2026-6791

6.6 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

CVE-2026-77117

5.9 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

CVE-2026-80489

5.9 (Medium)


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

Affected products

Recommended 12 products, the same list as for CVE-2026-18374

Threats

Impact moderate

References

32 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1274723	self
https://bugzilla.suse.com/1274726	self
https://bugzilla.suse.com/1276892	self
https://bugzilla.suse.com/1276946	self
https://bugzilla.suse.com/1277262	self
https://bugzilla.suse.com/1277921	self
https://bugzilla.suse.com/1277922	self
https://www.suse.com/security/cve/CVE-2026-18374/	self
https://www.suse.com/security/cve/CVE-2026-19499/	self
https://www.suse.com/security/cve/CVE-2026-19542/	self
https://www.suse.com/security/cve/CVE-2026-6368/	self
https://www.suse.com/security/cve/CVE-2026-6791/	self
https://www.suse.com/security/cve/CVE-2026-77117/	self
https://www.suse.com/security/cve/CVE-2026-80489/	self
https://www.suse.com/security/cve/CVE-2026-18374	external
https://bugzilla.suse.com/1277262	external
https://www.suse.com/security/cve/CVE-2026-19499	external
https://bugzilla.suse.com/1276892	external
https://www.suse.com/security/cve/CVE-2026-19542	external
https://bugzilla.suse.com/1276946	external
https://www.suse.com/security/cve/CVE-2026-6368	external
https://bugzilla.suse.com/1274726	external
https://www.suse.com/security/cve/CVE-2026-6791	external
https://bugzilla.suse.com/1274723	external
https://www.suse.com/security/cve/CVE-2026-77117	external
https://bugzilla.suse.com/1277921	external
https://www.suse.com/security/cve/CVE-2026-80489	external
https://bugzilla.suse.com/1277922	external

JSON

To clipboard

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          "text": "Passing an effectively empty string to the `,ccs=` syntax extension of the mode argument in the `fopen` function in the GNU C Library version 2.45 or earlier may result in a heap buffer overflow when the mode string input to the function is attacker controlled.\n\n\n\nThis usage pattern is not seen in applications in common GNU/Linux distributions and applications that process user-supplied values for `ccs` should not pass them through without validation.",
          "title": "CVE description"
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          "text": "Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding.\n\nExploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller.\n\nAt the time of publication, no network-facing application impact is known.",
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          "text": "Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43  can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.",
          "title": "CVE description"
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}

CVE-2026-18374 (GCVE-0-2026-18374)

Vulnerability from cvelistv5 – Published: 2026-08-27 19:20 – Updated: 2026-08-28 15:37

Summary

Passing an effectively empty string to the `,ccs=` syntax extension of the mode argument in the `fopen` function in the GNU C Library version 2.45 or earlier may result in a heap buffer overflow when the mode string input to the function is attacker controlled. This usage pattern is not seen in applications in common GNU/Linux distributions and applications that process user-supplied values for `ccs` should not pass them through without validation.

Severity

4.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 15:36 UTC

CWE

Buffer overflow in fopen mode argument processing
CWE-787 - Out-of-bounds write
CWE-787 - Out-of-bounds Write

Assigner

glibc redhat root

References

3 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34574	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/27/6

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 0 , < 2.45 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2026-19499 (GCVE-0-2026-19499)

Vulnerability from cvelistv5 – Published: 2026-09-14 17:11 – Updated: 2026-09-14 19:40

Title

Buffer overflow in strfmon and strfmon_l right-justification padding

Summary

Calling strfmon and strfmon_l in the GNU C Library version 2.38 to 2.44 can write past the end of the caller-supplied output buffer when a conversion uses right-justified width padding. Exploitation requires an application code path that calls strfmon or strfmon_l with right-justified width padding into a destination buffer that is large enough for the padding to succeed but too small for the internal memmove call. The field width or format may be attacker-influenced or a fixed susceptible pattern in the caller. At the time of publication, no network-facing application impact is known.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:40 UTC

CWE

CWE-122 - Heap-based buffer overflow

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34510	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.38 , ≤ 2.44 (custom)

Date Public

2026-08-11 04:00

Credits

AISLE in partnership with Red Hat

Show details on NVD website

JSON

To clipboard

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CVE-2026-19542 (GCVE-0-2026-19542)

Vulnerability from cvelistv5 – Published: 2026-09-14 17:18 – Updated: 2026-09-14 19:42

Title

Stack-based out-of-bounds write in tdelete during tree rebalancing

Summary

Calling tdelete on a sufficiently deep tree in the GNU C Library version 2.1 to 2.44 may write one pointer past the end of an alloca-allocated array on the stack, which may crash the application. The tdelete implementation keeps an explicit stack of parent nodes for rebalancing, which is grown as needed while descending the tree. Two rebalancing branches push an additional entry without checking the capacity, and write past the array when the stack is exactly full. Triggering this requires a node at a depth of exactly 40 (or 40 plus a multiple of 20), which implies a tree with at least a million nodes, so an attacker must drive a large number of insertions and deletions through an application that uses tsearch and tdelete. The written value is a pointer into a tree node and is not directly attacker controlled. No affected application in common distributions has been identified.

Severity

5.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:41 UTC

CWE

CWE-121 - Stack-based buffer overflow

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34506	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.1 , ≤ 2.44 (custom)

Date Public

2026-08-11 04:00

Credits

AISLE in partnership with Red Hat

Show details on NVD website

JSON

To clipboard

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CVE-2026-6368 (GCVE-0-2026-6368)

Vulnerability from cvelistv5 – Published: 2026-08-10 18:40 – Updated: 2026-08-12 18:01

Title

wordexp with WRDE_APPEND can return or use invalid memory

Summary

Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43 can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 18:00 UTC

CWE

CWE-908 - Use of uninitialized resource

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34090	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob;f=…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
glibc	glibc	Affected: 1.93-260 , < 2.43 (custom)

Date Public

2026-07-01 18:29

Credits

shinobu

Show details on NVD website

JSON

To clipboard

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CVE-2026-6791 (GCVE-0-2026-6791)

Vulnerability from cvelistv5 – Published: 2026-08-10 18:41 – Updated: 2026-08-12 18:01

Title

Potential stack-based buffer clash during tilde expansion in wordexp

Summary

When expanding paths that begin with a tilde (~) followed by a username, the internal parse_tilde function extracts the username to determine the user's home directory. The implementation allocates memory for this username directly on the stack using the strndupa macro. Because the size of this allocation was determined by the length of the user-supplied input without any bounds checks, passing an excessively long username e.g. thousands of characters, forces the thread to exhaust its stack space. Thus if an application passes untrusted, attacker-controlled input to the wordexp function, an attacker can trigger a stack clash.

Severity

6.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 18:01 UTC

CWE

CWE-121 - Stack-based buffer overflow

Assigner

glibc redhat root

References

1 reference

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34091	issue-tracking

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.0 , ≤ 2.43 (custom)

Credits

storm / 고준용 <rhwnsdyd1112@gmail.com>

Show details on NVD website

JSON

To clipboard

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CVE-2026-77117 (GCVE-0-2026-77117)

Vulnerability from cvelistv5 – Published: 2026-09-15 10:48 – Updated: 2026-09-15 12:26

Title

SHIFT_JISX0213 decoding may hang on crafted input

Summary

Converting crafted SHIFT_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang. Some SHIFT_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the SHIFT_JISX0213 character set is affected, which is not commonly used. The related defect in the EUC_JISX0213 converter is tracked separately as CVE-2026-80489.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 12:26 UTC

CWE

CWE-835 - Loop with unreachable exit condition ('infinite loop')

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34556	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.3 , ≤ 2.44 (custom)

Date Public

2026-08-21 04:00

Credits

AISLE in partnership with Red Hat

Show details on NVD website

JSON

To clipboard

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CVE-2026-80489 (GCVE-0-2026-80489)

Vulnerability from cvelistv5 – Published: 2026-09-15 10:51 – Updated: 2026-09-15 12:22

Title

EUC_JISX0213 decoding may hang on crafted input

Summary

Converting crafted EUC_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang. Some EUC_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the EUC_JISX0213 character set is affected, which is not commonly used. The related defect in SHIFT_JISX0213 converter is tracked separately as CVE-2026-77117.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 12:21 UTC

CWE

CWE-835 - Loop with unreachable exit condition ('infinite loop')

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34568	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob_pl…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.3 , ≤ 2.44 (custom)

Date Public

2026-08-26 04:00

Credits

AISLE in partnership with Red Hat

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.

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

SUSE-SU-2026:23830-1

CVE-2026-18374 (GCVE-0-2026-18374)

CVE-2026-19499 (GCVE-0-2026-19499)

CVE-2026-19542 (GCVE-0-2026-19542)

CVE-2026-6368 (GCVE-0-2026-6368)

CVE-2026-6791 (GCVE-0-2026-6791)

CVE-2026-77117 (GCVE-0-2026-77117)

CVE-2026-80489 (GCVE-0-2026-80489)

Tags

Sightings

Nomenclature

Related by attack behaviour