Vulnerability-Lookup

SUSE-SU-2026:20178-1

Vulnerability from csaf_suse - Published: 2026-01-29 16:36 - Updated: 2026-01-29 16:36

Summary

Security update for glibc

Notes

Title of the patch

Security update for glibc

Description of the patch

This update for glibc fixes the following issues: Security fixes: - CVE-2025-0395: Fixed buffer overflow in the assert() function (bsc#1236282). - CVE-2026-0861: Fixed inadequate size check in the memalign suite may result in an integer overflow (bsc#1256766). - CVE-2026-0915: Fixed uninitialized stack buffer used as DNS query name when net==0 in _nss_dns_getnetbyaddr_r (bsc#1256822). - CVE-2025-15281: Fixed uninitialized memory may cause the process abort (bsc#1257005). Other fixes: - NPTL: Optimize trylock for high cache contention workloads (bsc#1256436)

Patchnames

SUSE-SL-Micro-6.2-218

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

JSON

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      "references": [
        {
          "category": "external",
          "summary": "CVE-2025-0395",
          "url": "https://www.suse.com/security/cve/CVE-2025-0395"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1236282 for CVE-2025-0395",
          "url": "https://bugzilla.suse.com/1236282"
        }
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            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
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          "date": "2026-01-29T16:36:29Z",
          "details": "low"
        }
      ],
      "title": "CVE-2025-0395"
    },
    {
      "cve": "CVE-2025-15281",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-15281"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Calling wordexp with WRDE_REUSE in conjunction with WRDE_APPEND in the GNU C Library version 2.0 to version 2.42 may cause the interface to return uninitialized memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.",
          "title": "CVE description"
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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          "date": "2026-01-29T16:36:29Z",
          "details": "moderate"
        }
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      "title": "CVE-2025-15281"
    },
    {
      "cve": "CVE-2026-0861",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-0861"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Passing too large an alignment to the memalign suite of functions (memalign, posix_memalign, aligned_alloc) in the GNU C Library version 2.30 to 2.42 may result in an integer overflow, which could consequently result in a heap corruption.\n\nNote that the attacker must have control over both, the size as well as the alignment arguments of the memalign function to be able to exploit this.  The size parameter must be close enough to PTRDIFF_MAX so as to overflow size_t along with the large alignment argument.  This limits the malicious inputs for the alignment for memalign to the range [1\u003c\u003c62+ 1, 1\u003c\u003c63] and exactly 1\u003c\u003c63 for posix_memalign and aligned_alloc.\n\nTypically the alignment argument passed to such functions is a known constrained quantity (e.g. page size, block size, struct sizes) and is not attacker controlled, because of which this may not be easily exploitable in practice.  An application bug could potentially result in the input alignment being too large, e.g. due to a different buffer overflow or integer overflow in the application or its dependent libraries, but that is again an uncommon usage pattern given typical sources of alignments.",
          "title": "CVE description"
        }
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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-0915"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.",
          "title": "CVE description"
        }
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CVE-2025-0395 (GCVE-0-2025-0395)

Vulnerability from cvelistv5 – Published: 2025-01-22 13:11 – Updated: 2026-02-04 20:45

Summary

When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size aligns to page size.

Severity ?

6.2 (Medium)


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

CWE

CWE-131 - Incorrect Calculation of Buffer Size

Assigner

glibc

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2025/…
	https://sourceware.org/bugzilla/show_bug.cgi?id=32582
	https://sourceware.org/git/?p=glibc.git;a=blob;f=…
	https://sourceware.org/pipermail/libc-announce/20…

Impacted products

	Vendor	Product	Version
	The GNU C Library	glibc	Affected: 2.13 , ≤ 2.40 (custom)

Credits

Qualys Security Advisory

Show details on NVD website

JSON

To clipboard

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CVE-2025-15281 (GCVE-0-2025-15281)

Vulnerability from cvelistv5 – Published: 2026-01-20 13:22 – Updated: 2026-01-22 19:21

Title

wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory

Summary

Calling wordexp with WRDE_REUSE in conjunction with WRDE_APPEND in the GNU C Library version 2.0 to version 2.42 may cause the interface to return uninitialized memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.

Severity ?

7.5 (High)


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

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

glibc

References

URL

Tags

https://sourceware.org/bugzilla/show_bug.cgi?id=33814

Impacted products

	Vendor	Product	Version
	The GNU C Library	glibc	Affected: 2.0 , ≤ 2.42 (custom)

Credits

Vitaly Simonovich

Show details on NVD website

JSON

To clipboard

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CVE-2026-0915 (GCVE-0-2026-0915)

Vulnerability from cvelistv5 – Published: 2026-01-15 22:08 – Updated: 2026-01-20 16:03

Title

getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler

Summary

Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.

Severity ?

7.5 (High)


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

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

glibc

References

URL

Tags

https://sourceware.org/bugzilla/show_bug.cgi?id=33802

Impacted products

	Vendor	Product	Version
	The GNU C Library	glibc	Affected: 2.0 , ≤ 2.42 (custom)

Credits

Igor Morgenstern, Aisle Research

Show details on NVD website

JSON

To clipboard

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CVE-2026-0861 (GCVE-0-2026-0861)

Vulnerability from cvelistv5 – Published: 2026-01-14 21:01 – Updated: 2026-01-16 17:06

Title

Integer overflow in memalign leads to heap corruption

Summary

Passing too large an alignment to the memalign suite of functions (memalign, posix_memalign, aligned_alloc) in the GNU C Library version 2.30 to 2.42 may result in an integer overflow, which could consequently result in a heap corruption. Note that the attacker must have control over both, the size as well as the alignment arguments of the memalign function to be able to exploit this. The size parameter must be close enough to PTRDIFF_MAX so as to overflow size_t along with the large alignment argument. This limits the malicious inputs for the alignment for memalign to the range [1<<62+ 1, 1<<63] and exactly 1<<63 for posix_memalign and aligned_alloc. Typically the alignment argument passed to such functions is a known constrained quantity (e.g. page size, block size, struct sizes) and is not attacker controlled, because of which this may not be easily exploitable in practice. An application bug could potentially result in the input alignment being too large, e.g. due to a different buffer overflow or integer overflow in the application or its dependent libraries, but that is again an uncommon usage pattern given typical sources of alignments.

Severity ?

8.4 (High)


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

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

glibc

References

URL

Tags

	https://sourceware.org/bugzilla/show_bug.cgi?id=33796
	https://sourceware.org/git/?p=glibc.git;a=blob_pl…

Impacted products

	Vendor	Product	Version
	The GNU C Library	glibc	Affected: 2.30 , ≤ 2.42 (custom)

Credits

Igor Morgenstern, Aisle Research

Show details on NVD website

JSON

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              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

SUSE-SU-2026:20178-1

CVE-2025-0395 (GCVE-0-2025-0395)

CVE-2025-15281 (GCVE-0-2025-15281)

CVE-2026-0915 (GCVE-0-2026-0915)

CVE-2026-0861 (GCVE-0-2026-0861)

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Nomenclature