CVE-2022-29582 — In the Linux kernel before 5

In the Linux kernel before 5.17.3, fs/io_uring.c has a use-after-free due to a race condition in io_uring timeouts. This can be triggered by a local user who has no access to any user namespace; however, the race condition perhaps can only be exploited infrequently.

01What is this vulnerability?

In the Linux kernel before 5.17.3, fs/io_uring.c has a use-after-free due to a race condition in io_uring timeouts. This can be triggered by a local user who has no access to any user namespace; however, the race condition perhaps can only be exploited infrequently.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-04-22T16:15:09.393
• Last modified: 2026-08-13T19:31:47.900

09References

• www.openwall.com — http://www.openwall.com/lists/oss-security/2022/04/22/4
• www.openwall.com — http://www.openwall.com/lists/oss-security/2022/08/08/3
• www.openwall.com — http://www.openwall.com/lists/oss-security/2024/04/24/3
• cdn.kernel.org — https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
• git.kernel.org — https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e677e…
• github.com — https://github.com/Ruia-ruia/CVE-2022-29582-Exploit
• github.com — https://github.com/torvalds/linux/commit/e677edbcabee849bfdd43f1602bccbecf736a64…
• ruia-ruia.github.io — https://ruia-ruia.github.io/2022/08/05/CVE-2022-29582-io-uring/
• www.debian.org — https://www.debian.org/security/2022/dsa-5127
• www.openwall.com — https://www.openwall.com/lists/oss-security/2022/04/22/3