CVE-2025-21836 The advisory has been revoked - it doesn't affect any version of package linux-virt-doc (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-LINUXVIRTDOC-13782973
- published31 Oct 2025
- disclosed7 Mar 2025
Introduced: 7 Mar 2025
CVE-2025-21836 (opens in a new tab)Amendment
The Minimos security team deemed this advisory irrelevant for Minimos:latest.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-virt-doc package and not the linux-virt-doc package as distributed by Minimos.
In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: reallocate buf lists on upgrade
IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.
References
- https://www.cve.org/CVERecord?id=CVE-2025-21836
- https://github.com/advisories/GHSA-wh23-v966-32jj
- https://osv.dev/vulnerability/MINI-vhm3-h7wr-86hh
- https://osv.dev/vulnerability/CVE-2025-21836
- https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633
- https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4
- https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b
- https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603
- https://u1f383.github.io/slides/talks/2025_Hexacon-Deja_Vu_in_Linux_io_uring_Breaking_Memory_Sharing_Again_After_Generations_of_Fixes.pdf