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CVE-2025-21966

dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature

HIGH
7.8
CVSS Score
Published: April 1, 2025 at 03:47 PM UTC
Updated: August 5, 2026 at 12:44 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature Fix memory corruption due to incorrect parameter being passed to bio_init

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.13 ≤ v < 6.13.86.5 ≤ v < 6.12.206.5 ≤ v < 6.13.86.5 ≤ v < 6.146.5 ≤ v < 6.6.846.7 ≤ v < 6.12.201d9a943898533e83f20370c0e1448d606627522e6.14 rc16.14 rc26.14 rc36.14 rc46.14 rc56.14 rc6
Vendor states this is fixed in 57e9417f69839cb10f7ffca684c38acd28ceb57b (fixed)
Vendor states this is fixed in 5a87e46da2418c57b445371f5ca0958d5779ba5f (fixed)
Vendor states this is fixed in 818330f756f3800c37d738bd36bce60eac949938 (fixed)
Vendor states this is fixed in da070843e153471be4297a12fdaa64023276f40e (fixed)
Vendor states this is fixed in 6.12.20 (unaffected)
Vendor states this is fixed in 6.13.8 (unaffected)
Vendor states this is fixed in 6.14 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)
Vendor states this is fixed in 6.6.84 (unaffected)

References (4)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/57e9417f69839cb10f7ffca684c38acd28ceb57b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5a87e46da2418c57b445371f5ca0958d5779ba5f
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/818330f756f3800c37d738bd36bce60eac949938
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/da070843e153471be4297a12fdaa64023276f40e

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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