CVE-2026-98849: Linux kernel · pfcp: fix socket lifetime on netdevice registration failure
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in dcb8f6a79c3360a440c399d85df465a6e59351f1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · 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.
What to do
Upgrade Linux kernel to dcb8f6a79c3360a440c399d85df465a6e59351f1, 4b8ce1686dea1a10805a0807bf492409b0300ee1, 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46 or 0f17d2e3dd9cda3ee6d94033d5e5489af168920d.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
Debiandebian/linuxpkg:deb/debian/linuxOther threats | Affected
| 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 is available in the Linux kernel commits identified by hashes dcb8f6a79c3360a440c399d85df465a6e59351f1, 4b8ce1686dea1a10805a0807bf492409b0300ee1, 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46, and 0f17d2e3dd9cda3ee6d94033d5e5489af168920d. Users should update to a patched kernel version that includes these commits to remediate the issue.
Description
A null pointer dereference vulnerability in the Linux kernel's pfcp module occurs due to improper socket lifetime management on netdevice registration failure. This flaw happens when pfcp_newlink() creates a UDP socket before register_netdevice(), and if registration fails after pfcp_dev_init() succeeds, the socket is released twice, leading to a NULL pointer dereference.
References
- git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1 (opens in a new tab)
- git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1 (opens in a new tab)
- git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46 (opens in a new tab)
- git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d (opens in a new tab)