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CVE-2022-49579

ipv4: Fix data-races around sysctl_fib_multipath_hash_policy.

MEDIUM
4.7
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
MEDIUM4.7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix data-races around sysctl_fib_multipath_hash_policy. While reading sysctl_fib_multipath_hash_policy, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

Affected

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

Linux Kernel· Linux
95%
4.12 ≤ v < 5.15.584.12 ≤ v < 5.18.154.12 ≤ v < 5.195.16 ≤ v < 5.18.155.19 rc15.19 rc25.19 rc35.19 rc45.19 rc55.19 rc65.19 rc7bf4e0a3db97eb882368fd82980b3b1fa0b5b9778
Vendor states this is fixed in 21fb844bc1dc1461f5038d655aa1a14f39e13049 (fixed)
Vendor states this is fixed in 7998c12a08c97cc26660532c9f90a34bd7d8da5a (fixed)
Vendor states this is fixed in 918ee6592ab9a2ff5316d06cfd4aaef60ccabec6 (fixed)
Vendor states this is fixed in 4.12 (unaffected)
Vendor states this is fixed in 5.15.58 (unaffected)
Vendor states this is fixed in 5.18.15 (unaffected)
Vendor states this is fixed in 5.19 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/21fb844bc1dc1461f5038d655aa1a14f39e13049
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7998c12a08c97cc26660532c9f90a34bd7d8da5a
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/918ee6592ab9a2ff5316d06cfd4aaef60ccabec6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

4.7MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362

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