What’s Vulnerable › Vulnerabilities

CVE-2026-52960: ceph: put folios not suitable for writeback

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-21
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: put folios not suitable for writeback The batch holds references to the folios (see `filemap_get_folios`, `folio_batch_release`), so we need to `folio_put` the folios we remove. Tested on v6.18.

Affected products

• Linux kernel: from 6.15 before 7.0.10; 7.1-rc1, 7.1-rc2, 7.1-rc3 — fixed in 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 7.0.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/349499a65b6b5fb6f66ba3673598ab558f48c544
• https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0
• https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a

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