CVE-2022-49637

ipv4: Fix a data-race around sysctl_fib_sync_mem.

State: Published
Severity: 4.7 Medium
Published: Feb 26, 2025
Updated: May 11, 2026
Reserved: Feb 26, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

ipv4: Fix a data-race around sysctl_fib_sync_mem.

While reading sysctl_fib_sync_mem, it can be changed concurrently. So, we need to add READ_ONCE() to avoid a data-race.

Scores

CVSS	Score	Vector	Source
3.1	4.7 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 7c1acd98fb221dc0d847451b9ab86319f8b9916cAffected 9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 418b191d5f223a8cb6cab09eae1f72c04ba6adf2Affected 9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 9be8aac91960ea32fd0e874758c9afee665c57d2Affected 9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 190cd4ff128373271e065afb20f1d2247b3f10c3Affected 9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 73318c4b7dbd0e781aaababff17376b2894745c0Affected
LinuxLinux	5.2Affected before 5.2Not affected 5.4.207 through 5.4.Not affected 5.10.132 through 5.10.Not affected 5.15.56 through 5.15.Not affected 5.18.13 through 5.18.Not affected 5.19 and laterNot affected

Product

Versions

LinuxLinux

9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 7c1acd98fb221dc0d847451b9ab86319f8b9916cAffected
9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 418b191d5f223a8cb6cab09eae1f72c04ba6adf2Affected
9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 9be8aac91960ea32fd0e874758c9afee665c57d2Affected
9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 190cd4ff128373271e065afb20f1d2247b3f10c3Affected
9ab948a91b2c2abc8e82845c0e61f4b1683e3a4f to before 73318c4b7dbd0e781aaababff17376b2894745c0Affected

LinuxLinux

5.2Affected
before 5.2Not affected
5.4.207 through 5.4.*Not affected
5.10.132 through 5.10.*Not affected
5.15.56 through 5.15.*Not affected
5.18.13 through 5.18.*Not affected
5.19 and laterNot affected

References

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