CVE-2023-46862 — An issue was discovered in the Linux kernel through 6

An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

01What is this vulnerability?

An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

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: 2023-10-29T04:15:11.363
• Last modified: 2026-10-15T01:17:10.573

09References

• bugzilla.kernel.org — https://bugzilla.kernel.org/show_bug.cgi?id=218032#c4
• github.com — https://github.com/torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb4…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
• bugzilla.kernel.org — https://bugzilla.kernel.org/show_bug.cgi?id=218032#c4
• github.com — https://github.com/torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb4…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
• cert-portal.siemens.com — https://cert-portal.siemens.com/productcert/html/ssa-398330.html