CVE-2026-80797: Linux kernel · nfc: pn533: purge fragmented skbs during cleanup
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 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.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 has been implemented to purge the fragment_skb queue during cleanup in the pn53x_common_clean() function. Users should apply the updated Linux kernel version containing this fix once it is available. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the official patch and remediation guidance.
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: purge fragmented skbs during cleanup pn53x_common_clean() purges resp_q before freeing the common PN533 state, but it leaves fragment_skb untouched. The fragmentation helpers queue transmit fragments there while sending large initiator or target-mode frames, and those skbs remain owned by the driver until they are sent or discarded. If the device is removed while fragments are still queued, the common cleanup path frees the PN533 state without releasing the queued fragment skbs, leaking them. Purge fragment_skb during cleanup alongside resp_q.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80797 (opens in a new tab)
- git.kernel.org/stable/c/130b5ad4492f8e53d0398ee3af2b0e2388504d11 (opens in a new tab)
- git.kernel.org/stable/c/2f5d093194ec24d7c29b91bf7df014924e0f4ea1 (opens in a new tab)
- git.kernel.org/stable/c/4a52ec2457ff8c26206fcc20fa1972cc35a678c4 (opens in a new tab)
- git.kernel.org/stable/c/5718fc62198c38c2de5316020a90506f9e75e0bb (opens in a new tab)
- git.kernel.org/stable/c/9319c3c4962efc8697246b563ea31c6d47f085aa (opens in a new tab)
- git.kernel.org/stable/c/d63e85c5d5555fe6aa65155d3a09452597e163c3 (opens in a new tab)
- git.kernel.org/stable/c/e169277281373818ae1cedf976aa1e99118fb77d (opens in a new tab)
- git.kernel.org/stable/c/e7ed2ea5590fbe2d3be39ee4fb0c758a12e31d0c (opens in a new tab)
- git.kernel.org/stable/c/e95beff58b38c871c557bf84e528408283c2c0ad (opens in a new tab)
- ubuntu.com/security/CVE-2026-80797 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80797 (opens in a new tab)
- git.kernel.org/linus/5718fc62198c38c2de5316020a90506f9e75e0bb (opens in a new tab)