CVE-2026-52958
criticalpriority · track · 0EPSS 0.007 · 54 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.3–9.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (67)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2077Linux Kernel: Mehrere SchwachstellenDeutsch2026-06-24csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen und weitere, nicht näher spezifizierte Auswirkungen zu erzielen.
- CERTFR-2026-AVI-1333Multiples vulnérabilités dans le noyau Linux d'UbuntuFrançais2026-10-16vendor · certfrFR
also known as (4)
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sources
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references (25)
External citations — patches, advisories, analysis.
- https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863acnnvd
- https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649cnnvd
- https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098cnnvd
- https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4cnnvd
- https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197cnnvd
- https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9becnnvd
- https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8fcnnvd
- https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6bcnnvd
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