PT-2026-64578 · Linux · Linux

CVE-2026-64357 · Publicado 2026-07-25 · Atualizado 2026-07-25

Mitre

In the Linux kernel, the following vulnerability has been resolved:

xfs: fix exchmaps reservation limit check

xfs exchmaps estimate overhead() adds the bmbt and rmapbt overhead to a local resblks variable, but the final UINT MAX check still tests req->resblks. That is the reservation value from before the overhead was added.

The computed value is stored back in req->resblks and later passed to xfs trans alloc(), whose block reservation argument is unsigned int. Check the computed reservation so the existing limit applies to the value that will be used.

Identificadores relacionados

CVE-2026-64357

Produtos afetados

Linux

Referências · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-64357 · Nota de Segurança
• https://git.kernel.org/stable/c/0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 · Nota
• https://git.kernel.org/stable/c/4707344b0d36d1012c8a1716e20167cd3afdd5f1 · Nota
• https://git.kernel.org/stable/c/a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112 · Nota
• https://git.kernel.org/stable/c/c597c8580d50127fc1221b5a5b653a94d49e23e3 · Nota