Vulnerability 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).
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.3, < 5.10.258 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863aPatch
- https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649Patch
- https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098Patch
- https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4Patch
- https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197Patch
- https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9bePatch
- https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8fPatch
- https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6bPatch
FAQ
What is CVE-2026-52958?
CVE-2026-52958 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 o...
How severe is CVE-2026-52958?
CVE-2026-52958 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-52958?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.