ceph: put folios not suitable for writeback
CVE-2026-52960 · published 24 Jun 2026
How serious is it
- Severity: high, CVSS score 7.5 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-52960?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: ce80b76dd32764cc914975777e058d4fae4f0ea0 to < 349499a65b6b5fb6f66ba3673598ab558f48c544, ce80b76dd32764cc914975777e058d4fae4f0ea0 to < 86921e890fe1dea9791fb70bec552516fd47716a, ce80b76dd32764cc914975777e058d4fae4f0ea0 to < 544576f0f05c4a759806acddfaaeb686f14fb4b0, 0f2b2b7cacf888229cec19126e6791b11fb35f32
- Linux Linux: 6.15
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/349499a65b6b5fb6f66ba3673598ab558f48c544
- git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a
- git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON