OESA-2021-1239 (CVE-2021-33574)

Vulnerability from osv_openeuler – Published: 2021-06-26 11:04 – Updated: 2026-08-06 11:04 – Source website
VLAI
Summary
glibc security update
Details

The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.

Security Fix(es):

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.(CVE-2021-33574)

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libnsl-2.28-69.oe1.aarch64.rpm",
          "glibc-all-langpacks-2.28-69.oe1.aarch64.rpm",
          "glibc-benchtests-2.28-69.oe1.aarch64.rpm",
          "glibc-2.28-69.oe1.aarch64.rpm",
          "glibc-debugutils-2.28-69.oe1.aarch64.rpm",
          "glibc-common-2.28-69.oe1.aarch64.rpm",
          "nss_modules-2.28-69.oe1.aarch64.rpm",
          "glibc-locale-source-2.28-69.oe1.aarch64.rpm",
          "glibc-devel-2.28-69.oe1.aarch64.rpm",
          "glibc-debuginfo-2.28-69.oe1.aarch64.rpm",
          "glibc-nss-devel-2.28-69.oe1.aarch64.rpm",
          "nscd-2.28-69.oe1.aarch64.rpm",
          "glibc-debugsource-2.28-69.oe1.aarch64.rpm"
        ],
        "noarch": [
          "glibc-help-2.28-69.oe1.noarch.rpm"
        ],
        "src": [
          "glibc-2.28-69.oe1.src.rpm"
        ],
        "x86_64": [
          "glibc-devel-2.28-69.oe1.x86_64.rpm",
          "glibc-common-2.28-69.oe1.x86_64.rpm",
          "glibc-debugutils-2.28-69.oe1.x86_64.rpm",
          "glibc-2.28-69.oe1.x86_64.rpm",
          "glibc-benchtests-2.28-69.oe1.x86_64.rpm",
          "glibc-all-langpacks-2.28-69.oe1.x86_64.rpm",
          "glibc-debugsource-2.28-69.oe1.x86_64.rpm",
          "nss_modules-2.28-69.oe1.x86_64.rpm",
          "nscd-2.28-69.oe1.x86_64.rpm",
          "glibc-nss-devel-2.28-69.oe1.x86_64.rpm",
          "glibc-debuginfo-2.28-69.oe1.x86_64.rpm",
          "glibc-locale-source-2.28-69.oe1.x86_64.rpm",
          "libnsl-2.28-69.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "glibc",
        "purl": "pkg:rpm/openEuler/glibc\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.28-69.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.\r\n\r\nSecurity Fix(es):\r\n\r\nThe mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.(CVE-2021-33574)",
  "id": "OESA-2021-1239",
  "modified": "2026-08-06T11:04:28Z",
  "published": "2021-06-26T11:04:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1239"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33574"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "glibc security update",
  "upstream": [
    "CVE-2021-33574"
  ]
}



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