CVE-2022-49651

srcu: Tighten cleanup_srcu_struct() GP checks

HIGH
7.8
CVSS Score
Published: February 26, 2025 at 02:23 AM UTC
Updated: June 17, 2026 at 05:18 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: srcu: Tighten cleanup_srcu_struct() GP checks Currently, cleanup_srcu_struct() checks for a grace period in progress, but it does not check for a grace period that has not yet started but which might start at any time. Such a situation could result in a use-after-free bug, so this commit adds a check for a grace period that is needed but not yet started to cleanup_srcu_struct().

Affected

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

v < 5.18.114.12 ≤ v < 5.18.114.12 ≤ v < 5.194.12da915ad5cf25b5f5d358dd3670c3378d8ae8c03e
Vendor states this is fixed in 8ed00760203d8018bee042fbfe8e076579be2c2b (fixed)
Vendor states this is fixed in e997dda6502eefbc1032d6b0da7b353c53344b07 (fixed)
Vendor states this is fixed in 4.12 (unaffected)
Vendor states this is fixed in 5.18.11 (unaffected)
Vendor states this is fixed in 5.19 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8ed00760203d8018bee042fbfe8e076579be2c2b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e997dda6502eefbc1032d6b0da7b353c53344b07

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

StatusANALYZED
CWE
CWE-416

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