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CVE-2026-97499

Linux: coresight: perf: Retrieve path and source from event data

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)0.15%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0f4cb08f30011b7625a4fba668fa5c36da5e6637Fixed versionCVE List
Published24 Sep 2026Updated 28 Sep 2026CVE List

What fixes it

  • 0f4cb08f30011b7625a4fba668fa5c36da5e6637LinuxCVE 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:

coresight: perf: Retrieve path and source from event data

ETM perf callbacks currently use the per-CPU csdev_src pointer, which can race with updates during device registration and unregistration.

The AUX setup already builds and stores the path in the event data. Use this path to retrieve the source instead of csdev_src to avoid the race.

Export coresight_get_source() and add etm_event_get_ctxt_path() to retrieve the context's path and its source with READ_ONCE() / WRITE_ONCE() accessors. Give the comments to explain why this approach is safe when pause or resume callbacks preempt the disable callback (e.g. via NMI).

Text from CVE List

Affected versions 6

  • Linuxaffected: 0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4 before 0f4cb08f30011b7625a4fba668fa5c36da5e6637CVE List
  • Linuxaffected: 0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4 before f37bc31447c0ddafedb25e3c4a4f4e2284034247CVE List
  • Linuxaffected: 4.6CVE List
  • Linuxunaffected: all versions before 4.6CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 2