CVE-2026-64040: cachefiles: Fix error return when vfs_mkdir() fails
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026071906-CVE-2026-64040-6908@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix error return when vfs_mkdir() fails When vfs_mkdir() fails, the error code is not extracted from the returned error pointer. This causes mkdir_error to be reached with ret=0, which leads to returning ERR_PTR(0) (NULL) instead of a proper error pointer. Fix this by extracting the error code from the error pointer when vfs_mkdir() fails. The Linux kernel CVE team has assigned CVE-2026-64040 to this issue. Affected and fixed versions =========================== Issue introduced in 6.15 with commit 406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed and fixed in 7.0.11 with commit 0940108d27c6995e02819ff832be11892f0b208b Issue introduced in 6.15 with commit 406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed and fixed in 7.1 with commit 8a220d1c312c66194f4a33dd52d1fba42bc2b341 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-2026-64040 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: fs/cachefiles/namei.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/0940108d27c6995e02819ff832be11892f0b208b https://git.kernel.org/stable/c/8a220d1c312c66194f4a33dd52d1fba42bc2b341