CVE-2026-74433: rxrpc: Fix UAF in rxgk_issue_challenge()
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026081515-CVE-2026-74433-cada@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix UAF in rxgk_issue_challenge() Fix rxgk_issue_challenge() to free the page containing the challenge content after invoking the tracepoint as the whdr passed to the tracepoint points into the page just freed. The Linux kernel CVE team has assigned CVE-2026-74433 to this issue. Affected and fixed versions =========================== Issue introduced in 6.16 with commit 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a and fixed in 6.18.40 with commit 844b8525ce503405c462ad67f750bec648720397 Issue introduced in 6.16 with commit 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a and fixed in 7.1.5 with commit 83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8 Issue introduced in 6.16 with commit 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a and fixed in 7.2-rc1 with commit 107a4cb0d47e735830f852d83970d5c81f8e1e08 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-74433 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/rxrpc/rxgk.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/844b8525ce503405c462ad67f750bec648720397 https://git.kernel.org/stable/c/83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8 https://git.kernel.org/stable/c/107a4cb0d47e735830f852d83970d5c81f8e1e08