VulnerabilityPublished 18 Oct 2026

CVE-2026-98580: Linux kernel · nfc: llcp: Fix race condition in accept_queue lifecycle

Source GCVE Database

Authoritative record:CVE-2026-98580· High

Not known to be exploited · fixed in da8a07757383614a8380a0f7dd54749d2687b82e : patch Linux kernel soon.

Data as of 26 Oct 2026, 13:47 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in da8a07757383614a8380a0f7dd54749d2687b82e, d2093a0981138876212bc5f473bdbfba0786e064, d5e1c92d09caed19f2988739695ce611a86ba6f8 +5

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-f48w-jg7j-gjm2

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < da8a07757383614a8380a0f7dd54749d2687b82e	Fixed in da8a07757383614a8380a0f7dd54749d2687b82e
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < d2093a0981138876212bc5f473bdbfba0786e064	Fixed in d2093a0981138876212bc5f473bdbfba0786e064
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < d5e1c92d09caed19f2988739695ce611a86ba6f8	Fixed in d5e1c92d09caed19f2988739695ce611a86ba6f8
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < c3eef2f988a3db9690369d7cef9a3344dd9788d3	Fixed in c3eef2f988a3db9690369d7cef9a3344dd9788d3
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < 41256821762a7114906b178826d17098e2fa5992	Fixed in 41256821762a7114906b178826d17098e2fa5992
LinuxLinux	Affected ≥ 50b78b2a6500d0e97c204c1b6c51df8c17358bbe, < 53867f6acb1af7f12d6485fa8a2819318f89083b	Fixed in 53867f6acb1af7f12d6485fa8a2819318f89083b

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been applied to the Linux kernel source code. Users and administrators should update to the fixed kernel version containing this patch. No additional mitigation steps are indicated or required beyond applying the official fix.

Description

A race condition vulnerability in the Linux kernel's NFC LLCP socket handling was resolved. The flaw involved concurrent unlinking and releasing of the same child socket due to improper synchronization between socket release and accept dequeue operations, leading to potential use-after-free or NULL pointer dereference. The fix replaces a bottom-half lock with a process-context lock, defers final resource release to a workqueue to avoid sleeping in atomic context, and adds safeguards to prevent object resurrection and listener hangs. The vulnerability affects the NFC LLCP socket lifecycle and was addressed with multiple synchronization and lifecycle management improvements.

References

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