VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98790: Linux kernel · perf: Fix race between perf_event_exit_task() and perf_pending_task()

Source GCVE Database

Authoritative record:CVE-2026-98790

Not known to be exploited · fixed in ffb684f2aa141eeb0caa6308422e7e05d1ded7c4 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ffb684f2aa141eeb0caa6308422e7e05d1ded7c4, 524063fea29f8a841e49927ea7a8085194ad3ec2, 672b8a9ce8f51b991481dfde26fba5cc4340a91a +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-hx5j-phv4-m97w

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 97ba62b278674293762c3d91f724f1bb922f04e0, < ffb684f2aa141eeb0caa6308422e7e05d1ded7c4	Fixed in ffb684f2aa141eeb0caa6308422e7e05d1ded7c4
LinuxLinux	Affected ≥ 97ba62b278674293762c3d91f724f1bb922f04e0, < 524063fea29f8a841e49927ea7a8085194ad3ec2	Fixed in 524063fea29f8a841e49927ea7a8085194ad3ec2
LinuxLinux	Affected ≥ 97ba62b278674293762c3d91f724f1bb922f04e0, < 672b8a9ce8f51b991481dfde26fba5cc4340a91a	Fixed in 672b8a9ce8f51b991481dfde26fba5cc4340a91a
LinuxLinux	Affected ≥ 97ba62b278674293762c3d91f724f1bb922f04e0, < 655acfa713bce9ae9c81a654459890c2f58cb4e8	Fixed in 655acfa713bce9ae9c81a654459890c2f58cb4e8
LinuxLinux	Affected ≥ 97ba62b278674293762c3d91f724f1bb922f04e0, < 81e61e3f8befa1bae3ec8e779d8ada5e5e362c21	Fixed in 81e61e3f8befa1bae3ec8e779d8ada5e5e362c21
LinuxLinux	Affected =5.13	Fixed in–

AI-suggested

A fix has been implemented to address this race condition by adding explicit checks for TASK_TOMBSTONE in the perf subsystem code. Since the vulnerability has been resolved, users should apply the official Linux kernel updates that include this fix. Patch status is not explicitly confirmed in the input data; therefore, verify with the vendor or Linux kernel advisory for the current remediation guidance.

Description

A race condition vulnerability in the Linux kernel's perf subsystem was resolved. The issue occurs between perf_event_exit_task() and perf_pending_task() during the begin_new_exec() process. The flaw involves a timing conflict where the PF_EXITING flag is not set on the task, causing perf_sigtrap() to execute improperly and trigger a warning. The fix involves checking if event->ctx->task equals TASK_TOMBSTONE to avoid redundant checks and race conditions.

References

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