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Review reviewHigh

CVE-2022-50697

Linux

In the Linux kernel, the following vulnerability has been resolved: mrp: introduce active flags to prevent UAF when applicant uninit The caller of del_timer_sync must prevent restarting of the timer, If we have no this synchronization, there is a small probability that the cancellation will not be successful. And syzbot report the fellowing crash: ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:929 [inline] BUG: KASAN: use-after-free in enqueue_timer+0x18/0xa4 kernel/time/timer.c:605 Write at addr f9ff00002...

CVSS
7.8
EPSS
0.14%
3.52% percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mrp: introduce active flags to prevent UAF when applicant uninit The caller of del_timer_sync must prevent restarting of the timer, If we have no this synchronization, there is a small probability that the cancellation will not be successful. And syzbot report the fellowing crash: ================================================================== BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:929 [inline] BUG: KASAN: use-after-free in enqueue_timer+0x18/0xa4 kernel/time/timer.c:605 Write at addr f9ff00002...

Affected product and versions

Product
Linux
Affected versions
>= febf018d22347b5df94066bca05d0c11a84e839d < 98f53e591940e4c3818be358c5dc684d5b30cb56, >= febf018d22347b5df94066bca05d0c11a84e839d < aacffc1a8dbf67c5463cb4f67b37143c01ca6fa9, >= febf018d22347b5df94066bca05d0c11a84e839d < 78d48bc41f7726113c9f114268d3ab11212814da, >= febf018d22347b5df94066bca05d0c11a84e839d < aadb1507a77b060c529edfeaf67f803e31461f24, >= febf018d22347b5df94066bca05d0c11a84e839d < 755eb0879224ffc2a43de724554aeaf0e51e5a64, >= febf018d22347b5df94066bca05d0c11a84e839d < 5d5a481a7fd0234f617535dc464ea010804a1129, >= febf018d22347b5df94066bca05d0c11a84e839d < 1a185fe83c2a60c1e3596fb9d82dbeb148dc09c6, >= febf018d22347b5df94066bca05d0c11a84e839d < 563e45fd5046045cc194af3ba17f5423e1c98170, >= febf018d22347b5df94066bca05d0c11a84e839d < ab0377803dafc58f1e22296708c1c28e309414d6, >= 3.9
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2022-50697 — Linux | SECUFOCUS NOW