CVE-2025-21832

CVE-2025-21832

Título es
CVE-2025-21832

Jue, 06/03/2025 – 17:15

Gravedad 2.0 Txt
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Título en

CVE-2025-21832

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

block: don't revert iter for -EIOCBQUEUED

blkdev_read_iter() has a few odd checks, like gating the position and
count adjustment on whether or not the result is bigger-than-or-equal to
zero (where bigger than makes more sense), and not checking the return
value of blkdev_direct_IO() before doing an iov_iter_revert(). The
latter can lead to attempting to revert with a negative value, which
when passed to iov_iter_revert() as an unsigned value will lead to
throwing a WARN_ON() because unroll is bigger than MAX_RW_COUNT.

Be sane and don't revert for -EIOCBQUEUED, like what is done in other
spots.

06/03/2025

06/03/2025

Gravedad 3.1 Txt Gravedad 3.1 (CVSS 3.1 Base Score)
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