Moderate: glibc security, bug fix, and enhancement update

{
  "id": "8ec0d372be501b2a270c96336b22a1ae0bd6bf3bacfb14143cdc53241c41457c",
  "url": "https://osv.dev/vulnerability/RLSA-2026%3A76781",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Moderate: glibc security, bug fix, and enhancement update",
    "summary": "The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Security Fix(es): * glibc: Process abort due to invalid memory in wordexp (CVE-2026-6368) * glibc: Denial of Service via stack exhaustion during tilde expansion (CVE-2026-6791) * glibc: Buffer Overflow in strfmon right-justification padding (CVE-2026-19499) * glibc: Fix out-of-bounds array write in tdelete (CVE-2026-19542) Bug Fix(es) and Enhancement(s): * The iconv utility no longer returns exit status 1 after a successful //TRANSLIT transliteration * A counter overflow in __wcsmbs_clone_conv that occurred when setlocale was called has been fixed * A fcntl.h header conflict when compiling on Rocky Linux 10 has been resolved * Minor documentation improvements have been picked up from upstream For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
    "evidence": "osv:RLSA-2026:76781",
    "products": [
      {
        "name": {
          "value": "glibc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0:2.39-142.el10_2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "RLSA-2026:76781",
      "aliases": [
        "RLSA-2026:76781"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0:2.39-142.el10_2"
                }
              ],
              "database_specific": {
                "yum_repository": "BaseOS"
              }
            }
          ],
          "package": {
            "name": "glibc",
            "purl": "pkg:rpm/rocky-linux/glibc?distro=rocky-linux-10&epoch=0",
            "ecosystem": "Rocky Linux:10"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/resf-osv-data/RLSA-2026:76781.json"
          }
        }
      ],
      "modified": "2026-10-11T12:30:02.677016211Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-19499",
        "CVE-2026-19542",
        "CVE-2026-6368",
        "CVE-2026-6791"
      ],
      "references": [
        "https://errata.rockylinux.org/RLSA-2026:76781",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2513603",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2513608",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2523249",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2523258",
        "https://access.redhat.com/errata/RHSA-2026:76781"
      ],
      "provider_metadata": {
        "license": "CC-BY-4.0",
        "license_url": "https://creativecommons.org/licenses/by/4.0/",
        "source_advisory": "RHSA-2026:76781"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-19499",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-19542",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-6368",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-6791",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 286027,
  "published_at": "2026-10-11T12:08:34.987335+00:00"
}