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

CVE-2026-52960 is fixed in linux on 1 platform by DEBIAN-CVE-2026-52960 (version 7.0.10-1), released June 25, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-52960
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.0061
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 24, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52960

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.10-1 | [DEBIAN-CVE-2026-52960](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52960.md) | Jun 25, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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