CVE-2021-41073

medium

Published — · Modified —

CVSS v3

—

CVSS v2

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VIR risk

5.5

Description

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-41073

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-41073.html

OS impact

OS	Version	Status	Fixed in
arch		fixed	`5.10.68-1`
sles		affected
debian	bookworm	fixed	`5.14.6-2`
debian	bullseye	fixed	`5.10.46-5`
debian	forky	fixed	`5.14.6-2`
debian	sid	fixed	`5.14.6-2`
debian	trixie	fixed	`5.14.6-2`

References

https://www.suse.com/security/cve/CVE-2021-41073.html
https://security-tracker.debian.org/tracker/CVE-2021-41073

Verify integrity in audit chain (admin only). AS-IS.