CVE-2026-52958
In the Linux kernel, the following vulnerability has been resolved:
libceph: Fix potential out-of-bounds access in osdmap_decode()
When decoding osdstate and osdweight from an incoming osdmap in
osdmapdecode(), both are decoded for each osd, i.e., map->maxosd
times. The cephdecodeneed() check only accounts for
sizeof(*map->osd_weight) once. This can potentially result in an
out-of-bounds memory access if the incoming message is corrupted such
that the max_osd value exceeds the actual content of the osdmap message.
This patch fixes the issue by changing the corresponding part in the
cephdecodeneed() check to account for
map->maxosdsizeof(map->osdweight).
Package Versions Affected
Automatically patch vulnerabilities without upgrading
CVSS Version
Related Resources
References
https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a, https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649, https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098, https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4, https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197, https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be, https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f, https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52958.json, https://nvd.nist.gov/vuln/detail/CVE-2026-52958, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git