CVE-2026-52958libceph: Fix potential out-of-bounds access in osdmap_decode()
Updated under an hour ago ()
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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
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 36a79759a288961b1ff28a68ec2d1f56f6848098; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 3f2575bb7f955d42569d96c3e04fa958a0dcf4b4; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 8713bbc4b2b9ad78f803978e54b7e49dd21bd9be; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 0d2dd7e6bb74fd7712aa73457a4a821906c6863a; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before e7187f33c02488697ec0d01d82bf7a3f8deaba8f; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 48df98d12b15360cd56af5c1f460307b340c1197; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before ee933694645dac062d65fc2743f92bc06fa0db6b; from dcbc919a5dc8c2629684a113a90c0b6fe10c3462 before 35d0ed82d03e5ee77ea4f31f20e29562a7721649 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.3 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 7.1; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098patch
- https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4patch
- https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9bepatch
- https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863apatch
- https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8fpatch
- https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197patch
- https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6bpatch
- https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.