CVEvulnerability

CVE-2025-21832

5.5 MEDIUM Published 2025-03-06 Modified 2026-10-15 Official page ↗
Status
Modified
Published
2025-03-06
Last modified
2026-10-15
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

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.

Affected configurations

• linux linux kernel (>= 5.17.1 < 6.1.129) • linux linux kernel (>= 6.2 < 6.6.78) • linux linux kernel (>= 6.7 < 6.12.14) • linux linux kernel (>= 6.13 < 6.13.3) • linux linux kernel 5.17

References