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CVE-2026-97924

Linux: tracing/user_events: Don't destroy fields when event removal fails

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in9c62b7e92b6086a2a0aeb71f3553dd8cf7fdcd8bAlso 0892da2272ec565858aa1ec5458552d699de9142, 62d6544e86506bb0695c9594c713cba859666f2f and 1 moreCVE List
Published25 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 9c62b7e92b6086a2a0aeb71f3553dd8cf7fdcd8bLinuxCVE List
  • 0892da2272ec565858aa1ec5458552d699de9142LinuxCVE List
  • 62d6544e86506bb0695c9594c713cba859666f2fLinuxCVE List
  • 2deb753127d7b7035e893955c5e91875e767d1f8LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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

tracing/user_events: Don't destroy fields when event removal fails

destroy_user_event() destroys the event's fields before attempting to remove the trace event call. If user_event_set_call_visible() fails, e.g. because the event is still enabled and trace_remove_event_call() returns -EBUSY, the event is left registered with an irreversibly destroyed field list. Any subsequent interaction with the event then operates on an empty field list while it is still fully visible in tracefs.

Move the field destruction after the call removal, and splice the field list back onto the event when the removal fails so the event remains in a consistent state.

Text from CVE List

Affected versions 12

  • Linuxaffected: 7f5a08c79df35e68f1a43033450c5050f12bc155 before a3d9b8b7c8f3627976fe758c77ffd3da260824d7CVE List
  • Linuxaffected: 7f5a08c79df35e68f1a43033450c5050f12bc155 before 9c62b7e92b6086a2a0aeb71f3553dd8cf7fdcd8bCVE List
  • Linuxaffected: 7f5a08c79df35e68f1a43033450c5050f12bc155 before 0892da2272ec565858aa1ec5458552d699de9142CVE List
  • Linuxaffected: 7f5a08c79df35e68f1a43033450c5050f12bc155 before 62d6544e86506bb0695c9594c713cba859666f2fCVE List
  • Linuxaffected: 7f5a08c79df35e68f1a43033450c5050f12bc155 before 2deb753127d7b7035e893955c5e91875e767d1f8CVE List
  • Linuxaffected: 5.18CVE List
  • Linuxunaffected: all versions before 5.18CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.7 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5