CVE-2023-52732: ceph: blocklist the kclient when receiving corrupted snap trace

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-21 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: blocklist the kclient when receiving corrupted snap trace When received corrupted snap trace we don't know what exactly has happened in MDS side. And we shouldn't continue IOs and metadatas access to MDS, which may corrupt or get incorrect contents. This patch will just block all the further IO/MDS requests immediately and then evict the kclient itself. The reason why we still need to evict the kclient just after blocking all the further IOs is that the MDS could revoke the caps faster.

Affected products

Linux kernel: from 2.6.35 before 6.1.13; 2.6.34, 2.6.34-rc2, 2.6.34-rc3, 2.6.34-rc4, 2.6.34-rc5, 2.6.34-rc6 (+7) — fixed in 6.1.13

How to fix

Upgrade to a fixed version: Linux kernel 6.1.13. Check the vendor advisory for mitigations.

References

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