VulnerabilityPublished 25 Sep 2026Updated 19 Oct 2026

CVE-2026-97924: Linux kernel · tracing/user_events: Don't destroy fields when event removal fails

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in a3d9b8b7c8f3627976fe758c77ffd3da260824d7 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in a3d9b8b7c8f3627976fe758c77ffd3da260824d7, 0892da2272ec565858aa1ec5458552d699de9142, 62d6544e86506bb0695c9594c713cba859666f2f +2

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 7f5a08c79df35e68f1a43033450c5050f12bc155, < a3d9b8b7c8f3627976fe758c77ffd3da260824d7	Fixed in a3d9b8b7c8f3627976fe758c77ffd3da260824d7
LinuxLinux	Affected ≥ 7f5a08c79df35e68f1a43033450c5050f12bc155, < 0892da2272ec565858aa1ec5458552d699de9142	Fixed in 0892da2272ec565858aa1ec5458552d699de9142
LinuxLinux	Affected ≥ 7f5a08c79df35e68f1a43033450c5050f12bc155, < 62d6544e86506bb0695c9594c713cba859666f2f	Fixed in 62d6544e86506bb0695c9594c713cba859666f2f
LinuxLinux	Affected ≥ 7f5a08c79df35e68f1a43033450c5050f12bc155, < 9c62b7e92b6086a2a0aeb71f3553dd8cf7fdcd8b	Fixed in 9c62b7e92b6086a2a0aeb71f3553dd8cf7fdcd8b
LinuxLinux	Affected ≥ 7f5a08c79df35e68f1a43033450c5050f12bc155, < 2deb753127d7b7035e893955c5e91875e767d1f8	Fixed in 2deb753127d7b7035e893955c5e91875e767d1f8
LinuxLinux	Affected =5.18	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel source (commits identified by hashes such as a3d9b8b7c8f3627976fe758c77ffd3da260824d7). Users should update to a Linux kernel version including these fixes to resolve the issue. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel tracing subsystem (user_events) was fixed where event fields were destroyed prematurely if event removal failed. This could leave an event registered with an empty field list but still visible, causing inconsistent state during subsequent interactions.

Impact

The vulnerability causes the tracing event to enter an inconsistent state where its fields are destroyed but the event remains visible and registered. This could lead to incorrect behavior or errors when interacting with the event through tracefs. There is no indication of privilege escalation or system compromise. No known exploits in the wild have been reported.

Summary

CVE-2026-97924 addresses a flaw in the Linux kernel's tracing user_events component. The function destroy_user_event() would destroy the event's fields before attempting to remove the trace event call. If removal failed (e.g., due to the event still being enabled and trace_remove_event_call() returning -EBUSY), the event remained registered but with its field list irreversibly destroyed. This inconsistency could cause subsequent operations on the event to interact with an empty field list while the event remained visible in tracefs. The fix moves field destruction after call removal and restores the field list if removal fails, maintaining event consistency.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 13:23 UTC

Technical details

References

Community reviews

Related threats