VulnerabilityPublished 18 Oct 2026

CVE-2026-98849: Linux kernel · pfcp: fix socket lifetime on netdevice registration failure

Source GCVE Database

Authoritative record:CVE-2026-98849· Medium

Not known to be exploited · fixed in dcb8f6a79c3360a440c399d85df465a6e59351f1 : 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 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in dcb8f6a79c3360a440c399d85df465a6e59351f1, 4b8ce1686dea1a10805a0807bf492409b0300ee1, 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46 +1

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-gh42-phxg-w86j

What to do

Upgrade Linux kernel to dcb8f6a79c3360a440c399d85df465a6e59351f1, 4b8ce1686dea1a10805a0807bf492409b0300ee1, 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46 or 0f17d2e3dd9cda3ee6d94033d5e5489af168920d.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 76c8764ef36a5d37ea2e551bda28ac7f028383ba, < dcb8f6a79c3360a440c399d85df465a6e59351f1	Fixed in dcb8f6a79c3360a440c399d85df465a6e59351f1
LinuxLinux	Affected ≥ 76c8764ef36a5d37ea2e551bda28ac7f028383ba, < 4b8ce1686dea1a10805a0807bf492409b0300ee1	Fixed in 4b8ce1686dea1a10805a0807bf492409b0300ee1
LinuxLinux	Affected ≥ 76c8764ef36a5d37ea2e551bda28ac7f028383ba, < 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46	Fixed in 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46
LinuxLinux	Affected ≥ 76c8764ef36a5d37ea2e551bda28ac7f028383ba, < 0f17d2e3dd9cda3ee6d94033d5e5489af168920d	Fixed in 0f17d2e3dd9cda3ee6d94033d5e5489af168920d
LinuxLinux	Affected =6.10	Fixed in–
Debiandebian/linux`pkg:deb/debian/linux`Other threats	Affected =6.10	Fixed in–

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

AI-suggested

A fix has been implemented in the Linux kernel to address this issue by preventing double release of the socket resource. Users should apply the official kernel update that includes this fix. Since this is a kernel-level issue, updating to the patched kernel version is the recommended remediation.

Description

A vulnerability in the Linux kernel's pfcp subsystem was resolved involving improper socket lifetime management during netdevice registration failure. Specifically, a NULL pointer dereference could occur if the netdevice registration failed after socket creation, due to double release of the socket resource. This issue was identified through fault injection testing and results in a kernel NULL pointer dereference.

References

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