SUSE-SU-2026:21069-1

Vulnerability from csaf_suse - Published: 2026-04-09 11:02 - Updated: 2026-04-09 11:02
Summary
Security update for glibc
Severity
Important
Notes
Title of the patch: Security update for glibc
Description of the patch: This update for glibc fixes the following issues: - CVE-2026-4437: incorrect DNS response parsing via crafted DNS server response (bsc#1260078). - CVE-2026-4438: invalid DNS hostname returned via gethostbyaddr functions (bsc#1260082).
Patchnames: SUSE-SLE-Micro-6.0-659
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

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          "text": "Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library\u0027s DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.",
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            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:glibc-2.38-12.1.aarch64",
            "SUSE Linux Micro 6.0:glibc-2.38-12.1.s390x",
            "SUSE Linux Micro 6.0:glibc-2.38-12.1.x86_64",
            "SUSE Linux Micro 6.0:glibc-devel-2.38-12.1.aarch64",
            "SUSE Linux Micro 6.0:glibc-devel-2.38-12.1.s390x",
            "SUSE Linux Micro 6.0:glibc-devel-2.38-12.1.x86_64",
            "SUSE Linux Micro 6.0:glibc-locale-2.38-12.1.aarch64",
            "SUSE Linux Micro 6.0:glibc-locale-2.38-12.1.s390x",
            "SUSE Linux Micro 6.0:glibc-locale-2.38-12.1.x86_64",
            "SUSE Linux Micro 6.0:glibc-locale-base-2.38-12.1.aarch64",
            "SUSE Linux Micro 6.0:glibc-locale-base-2.38-12.1.s390x",
            "SUSE Linux Micro 6.0:glibc-locale-base-2.38-12.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-09T11:02:01Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-4438"
    }
  ]
}


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Taxonomy of the tags.


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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.


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Detection rules are retrieved from Rulezet.

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