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CVE-2024-38663

blk-cgroup: fix list corruption from resetting io stat

MEDIUM
5.5
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
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix list corruption from resetting io stat Since commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()"), each iostat instance is added to blkcg percpu list, so blkcg_reset_stats() can't reset the stat instance by memset(), otherwise the llist may be corrupted. Fix the issue by only resetting the counter part.

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 < 6.9.43b8cc6298724021da845f2f9fd7dd4b6829a68176.2
Vendor states this is fixed in 6da6680632792709cecf2b006f2fe3ca7857e791 (fixed)
Vendor states this is fixed in 89bb36c72e1951843f9e04dc84412e31fcc849a9 (fixed)
Vendor states this is fixed in d4a60298ac34f027a09f8f893fdbd9e06279bb24 (fixed)
Vendor states this is fixed in 6.10 (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/6da6680632792709cecf2b006f2fe3ca7857e791
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/89bb36c72e1951843f9e04dc84412e31fcc849a9
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d4a60298ac34f027a09f8f893fdbd9e06279bb24

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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