VulnerabilityPublished 25 Sep 2026Updated 21 Oct 2026

CVE-2026-97961: Linux kernel · perf/core: Allow list_del during perf_event_overflow()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in fa360a018369f3eb4fe4f4792238adfc1f6fd5dc : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fa360a018369f3eb4fe4f4792238adfc1f6fd5dc, e2770c76a02452fddb52e9e05c7ed6acfef06c32, 723e85fb2c3bcd237ac02cbd69502ed62ce0068c +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 ≥ bd27568117664b8b3e259721393df420ed51f57b, < fa360a018369f3eb4fe4f4792238adfc1f6fd5dc	Fixed in fa360a018369f3eb4fe4f4792238adfc1f6fd5dc
LinuxLinux	Affected ≥ bd27568117664b8b3e259721393df420ed51f57b, < e2770c76a02452fddb52e9e05c7ed6acfef06c32	Fixed in e2770c76a02452fddb52e9e05c7ed6acfef06c32
LinuxLinux	Affected ≥ bd27568117664b8b3e259721393df420ed51f57b, < 723e85fb2c3bcd237ac02cbd69502ed62ce0068c	Fixed in 723e85fb2c3bcd237ac02cbd69502ed62ce0068c
LinuxLinux	Affected ≥ bd27568117664b8b3e259721393df420ed51f57b, < 59e63416f5153e7d58652c616fbdcb7d5e01fff7	Fixed in 59e63416f5153e7d58652c616fbdcb7d5e01fff7
LinuxLinux	Affected ≥ bd27568117664b8b3e259721393df420ed51f57b, < 6d0b9ce3be221c9077653f3670d60d66bb725ee2	Fixed in 6d0b9ce3be221c9077653f3670d60d66bb725ee2
LinuxLinux	Affected =6.2	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: perf/core: Allow list_del during perf_event_overflow() A PMU might use perf_sched_cb_inc() and perf_sched_cb_dec() interface to get the PMU call back function pmu::sched_task invoked at schedule in and schedule out. This is achieved by walking along the list anchored by sched_cb_list. The following scenario might lead to a list corruption. perf_pmu_sched_task() for_each_list_entry(..., &sched_cb_list) +--> __perf_pmu_sched_task() +--> event->pmu->sched_task()) +--> PMU_push_sample() +--> perf_event_overflow() +--> __perf_event_overflow() +--> pmu->stop() +--> perf_sched_cb_dec() remove entry from sched_cb_list while list node in use. This happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been invoked and perf_event::event_limit hits zero. Prevent the list corruption and convert for_each_list_entry() to for_each_list_entry_safe().

References

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