01 Record

CVE-2026-80557

libceph: fix OOB read in decode_watchers() via missing bounds check

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

libceph: fix OOB read in decode_watchers() via missing bounds check

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.52% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 44.2% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Received. NVD last modified this record on 2026-10-16.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-26 14:37Z2 MO AGO

Last updated

2026-10-16 19:26Z12 DAYS AGO

Reserved

2026-08-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

b88ef5206603b7cf3f329d9ab6e7942e0f9c562c3cd96ffd56fe08408251f4bc

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxa4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < 85479b7d65b4ebcb07fbbe57230976793974ab4a, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < 1c824e7c75bb4adf19553dd4ea944a5d83096be8, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < f161be39201eb5f9b1f58fb8f90b8a9cd3931eb6, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < eab3eeb68bfc639d74f27256f05546af5c4f787d, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < c59219a6b62d74936963983e5815524c3de8dd79, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < cb8246e5846dbbe34930903a90c7a90dd8e5910b, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < 7130d94846dadbb97b6b7f4d78a3a7bba6e3daa1, a4ed38d7a180f184a6e7aedd09db9ca4b1e6a71c to < 00ead17c7de137a692edee59f2772e6af687e8eb, 4.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/85479b7d65b4ebcb07fbbe57230976793974ab4a
git.kernel.orghttps://git.kernel.org/stable/c/1c824e7c75bb4adf19553dd4ea944a5d83096be8
git.kernel.orghttps://git.kernel.org/stable/c/f161be39201eb5f9b1f58fb8f90b8a9cd3931eb6
git.kernel.orghttps://git.kernel.org/stable/c/eab3eeb68bfc639d74f27256f05546af5c4f787d
git.kernel.orghttps://git.kernel.org/stable/c/c59219a6b62d74936963983e5815524c3de8dd79
git.kernel.orghttps://git.kernel.org/stable/c/cb8246e5846dbbe34930903a90c7a90dd8e5910b
git.kernel.orghttps://git.kernel.org/stable/c/7130d94846dadbb97b6b7f4d78a3a7bba6e3daa1
git.kernel.orghttps://git.kernel.org/stable/c/00ead17c7de137a692edee59f2772e6af687e8eb

07 Fixed in

Debian 12

linux
Fixed in 6.1.187-1
linux-6.12
Fixed in 6.12.107-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.107-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.