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Findings

CVE-2021-38604

In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference.

Published Aug 12, 2021 · updated Oct 14, 2026 · gnu glibc

In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 12, 2021 · NIST NVD

    Detected

    In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

  2. Oct 14, 2026 · NIST NVD

    Updated

    In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

Affected

  • cpe fedoraproject/fedora35
  • cpe gnu/glibcversion unspecified
  • cpe oracle/communications cloud native core binding support function22.1.3
  • cpe oracle/communications cloud native core network function cloud native environment22.1.0
  • cpe oracle/communications cloud native core network repository function22.1.2
  • cpe oracle/communications cloud native core network repository function22.2.0
  • cpe oracle/communications cloud native core security edge protection proxy22.1.1
  • cpe oracle/communications cloud native core unified data repository22.2.0

Sources

  • CVE.orgVulnerability recordCVE-2021-38604

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-38604

    30-day exploitation probability 3.7%

    first.org
  • NIST NVDVulnerability recordCVE-2021-38604

    In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

    nvd.nist.gov

References