Home

Description

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.

PUBLISHED Reserved 2024-12-29 | Published 2025-03-07 | Updated 2026-03-07 | Assigner Linux

Product status

Default status
unaffected

2fcabce2d7d34f69a888146dab15b36a917f09d4 (git) before 146a185f6c05ee263db715f860620606303c4633
affected

2fcabce2d7d34f69a888146dab15b36a917f09d4 (git) before 7d0dc28dae836caf7645fef62a10befc624dd17b
affected

2fcabce2d7d34f69a888146dab15b36a917f09d4 (git) before 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4
affected

2fcabce2d7d34f69a888146dab15b36a917f09d4 (git) before 8802766324e1f5d414a81ac43365c20142e85603
affected

Default status
affected

5.19
affected

Any version before 5.19
unaffected

6.6.79 (semver)
unaffected

6.12.16 (semver)
unaffected

6.13.4 (semver)
unaffected

6.14 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/146a185f6c05ee263db715f860620606303c4633

git.kernel.org/...c/7d0dc28dae836caf7645fef62a10befc624dd17b

git.kernel.org/...c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4

git.kernel.org/...c/8802766324e1f5d414a81ac43365c20142e85603

u1f383.github.io/...ing_Again_After_Generations_of_Fixes.pdf

cve.org (CVE-2025-21836)

nvd.nist.gov (CVE-2025-21836)

Download JSON