CVE-2021-33574
9.8
CRITICAL
CVSS 3.1
EPSS 0.13%
Description
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.
How to fix CVE-2021-33574
To remediate CVE-2021-33574, upgrade the affected package to a fixed version below.
- —upgrade to 2.31-13+deb11u3 or later
Is CVE-2021-33574 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.31-13+deb11u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |