Race Condition Affecting bpftool package, versions <0:4.18.0-372.9.1.el8


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.09% (40th percentile)

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  • Snyk IDSNYK-ALMALINUX8-BPFTOOL-5640278
  • published28 May 2023
  • disclosed10 May 2022

Introduced: 10 May 2022

CVE-2021-44733  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 bpftool to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in ALSA-2022:1988.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

A use-after-free exists in drivers/tee/tee_shm.c in the TEE subsystem in the Linux kernel through 5.15.11. This occurs because of a race condition in tee_shm_get_from_id during an attempt to free a shared memory object.

CVSS Scores

version 3.1