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CVE-2024-38384

blk-cgroup: fix list corruption from reorder of WRITE ->lqueued

HIGH
7.8
CVSS Score
Published: June 24, 2024 at 01:50 PM UTC
Updated: August 5, 2026 at 12:04 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: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued __blkcg_rstat_flush() can be run anytime, especially when blk_cgroup_bio_start is being executed. If WRITE of `->lqueued` is re-ordered with READ of 'bisc->lnode.next' in the loop of __blkcg_rstat_flush(), `next_bisc` can be assigned with one stat instance being added in blk_cgroup_bio_start(), then the local list in __blkcg_rstat_flush() could be corrupted. Fix the issue by adding one barrier.

Affected

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

Linux Kernel· Linux
95%
6.2 ≤ v < 6.106.2 ≤ v < 6.6.336.2 ≤ v < 6.9.46.7 ≤ v < 6.9.43b8cc62987243b8cc6298724021da845f2f9fd7dd4b6829a68176.2
Vendor states this is fixed in 714e59b5456e (fixed)
Vendor states this is fixed in 714e59b5456e4d6e4295a9968c564abe193f461c (fixed)
Vendor states this is fixed in 785298ab6b80 (fixed)
Vendor states this is fixed in 785298ab6b802afa75089239266b6bbea590809c (fixed)
Vendor states this is fixed in d0aac2363549 (fixed)
Vendor states this is fixed in d0aac2363549e12cc79b8e285f13d5a9f42fd08e (fixed)
Vendor states this is fixed in 6.10 (unaffected)
Vendor states this is fixed in 6.10-rc1 (unaffected)
Vendor states this is fixed in 6.2 (unaffected)
Vendor states this is fixed in 6.6.33 (unaffected)
Vendor states this is fixed in 6.9.4 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e

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-400

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