VulnerabilityPublished 25 Sep 2026Updated 21 Oct 2026

CVE-2026-97600: Linux kernel · ieee802154: cc2520: fix FIFOP work use-after-free

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ff5891b266a7fc6a062710836be84f1cc19338b5 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · 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 ff5891b266a7fc6a062710836be84f1cc19338b5, c68fd52c73b676aee67020011e98fea125a978f4, 890a80d516a1447db5c21bf92841a82914ea897d +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 ≥ 0da6bc8cc3417a5e452efb886ff2c61e72b743d6, < ff5891b266a7fc6a062710836be84f1cc19338b5	Fixed in ff5891b266a7fc6a062710836be84f1cc19338b5
LinuxLinux	Affected ≥ 0da6bc8cc3417a5e452efb886ff2c61e72b743d6, < c68fd52c73b676aee67020011e98fea125a978f4	Fixed in c68fd52c73b676aee67020011e98fea125a978f4
LinuxLinux	Affected ≥ 0da6bc8cc3417a5e452efb886ff2c61e72b743d6, < 890a80d516a1447db5c21bf92841a82914ea897d	Fixed in 890a80d516a1447db5c21bf92841a82914ea897d
LinuxLinux	Affected ≥ 0da6bc8cc3417a5e452efb886ff2c61e72b743d6, < 56a9919d8494fb118eebf167bef0622528fbf2e7	Fixed in 56a9919d8494fb118eebf167bef0622528fbf2e7
LinuxLinux	Affected ≥ 0da6bc8cc3417a5e452efb886ff2c61e72b743d6, < 4a1ba62a486a4c43af91d01661a95e82dc4aaefa	Fixed in 4a1ba62a486a4c43af91d01661a95e82dc4aaefa
LinuxLinux	Affected =3.17	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ieee802154: cc2520: fix FIFOP work use-after-free The FIFOP interrupt handler queues cc2520_fifop_irqwork. On removal, cc2520_remove() only flushes the work. The devm-managed FIFOP IRQ remains active until after ->remove() returns and can queue the work again after that flush, allowing it to run after the private data is released. Disable the work with disable_work_sync() instead of flushing it, so the handler can no longer queue it once removal begins. Destroy the buffer mutex last, since the worker and the stop callback invoked through ieee802154_unregister_hw() both take it. Found by an in-house static analysis tool.

References

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