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CVE-2025-21836

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CVE-2025-21836

Published: Mar 7, 2025

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
2fcabce2d7d34f69a888146dab15b36a917f09d4 - < 146a185f6c05ee263db715f860620606303c4633
affected
2fcabce2d7d34f69a888146dab15b36a917f09d4 - < 7d0dc28dae836caf7645fef62a10befc624dd17b
affected
2fcabce2d7d34f69a888146dab15b36a917f09d4 - < 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4
affected
2fcabce2d7d34f69a888146dab15b36a917f09d4 - < 8802766324e1f5d414a81ac43365c20142e85603

Linux

Linux

affected
5.19
unaffected
0 - < 5.19
unaffected
6.6.79 - <= 6.6.*
unaffected
6.12.16 - <= 6.12.*
unaffected
6.13.4 - <= 6.13.*

+1 more versions

References

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