CVE-2026-52958
Description
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in osdmap_decode() When decoding osd_state and osd_weight from an incoming osdmap in osdmap_decode(), both are decoded for each osd, i.e., map->max_osd times. The ceph_decode_need() 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 ceph_decode_need() check to account for map->max_osd*sizeof(*map->osd_weight).
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
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
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.