CVE-2022-49127

ref_tracker: implement use-after-free detection

State: Published
Severity: 7.0 High
Published: Feb 26, 2025
Updated: Aug 5, 2026
Reserved: Feb 26, 2025

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Description

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

ref_tracker: implement use-after-free detection

Whenever ref_tracker_dir_init() is called, mark the struct ref_tracker_dir as dead.

Test the dead status from ref_tracker_alloc() and ref_tracker_free()

This should detect buggy dev_put()/dev_hold() happening too late in netdevice dismantle process.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	4e66934eaadc83b27ada8d42b60894018f3bfabf to before 3743c9de303fa36c2e2ca2522ab280c52bcafbd2Affected 4e66934eaadc83b27ada8d42b60894018f3bfabf to before e3ececfe668facd87d920b608349a32607060e66Affected
LinuxLinux	5.17Affected before 5.17Not affected 5.17.3 through 5.17.*Not affected 5.18 and laterNot affected

References

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