VULNERABILITY

Debian: CVE-2025-21832: linux, linux-6.1 -- security update

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Debian: CVE-2025-21832: linux, linux-6.1 -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
03/06/2025
Created
03/18/2025
Added
03/17/2025
Modified
04/02/2025

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.

Solution(s)

  • debian-upgrade-linux
  • debian-upgrade-linux-6-1

References

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