THREATPORT/VULNERABILITY/CVE-2021-38604
HIGH SEVERITY

CVE-2021-38604

Glibc vulnerability

CVSS
7.5
EPSS
3.0%
EPSS pct
86th
Exploited
No known
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 vendor
Gnu
Affected product
Glibc
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-476 — NULL Pointer Dereference
Published
2021-08-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2021-38604

  • Confirm whether Gnu Glibc is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-38604.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-38604

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