CVE-2026-80803: Linux kernel · nfc: digital: clamp SENSF_RES length to the destination buffer
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 in the Linux kernel source code that clamps the response length before copying. Users should update to the patched Linux kernel version containing this fix. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisory for the exact fixed versions and update accordingly.
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: digital: clamp SENSF_RES length to the destination buffer digital_in_recv_sensf_res() memcpy()s resp->len bytes from a remote NFC-F device response into the NFC_SENSF_RES_MAXSIZE-byte target.sensf_res field without an upper-bound check. A nearby malicious NFC-F device can send an oversized SENSF_RES response to overflow the stack-local struct nfc_target. Clamp resp->len to NFC_SENSF_RES_MAXSIZE before the copy. Found by 0sec automated security-research tooling (https://0sec.ai).
References
- nvd.nist.gov/vuln/detail/CVE-2026-80803 (opens in a new tab)
- git.kernel.org/stable/c/31aa28ed732f66ab83c40ef53d99791be69b85c4 (opens in a new tab)
- git.kernel.org/stable/c/344a56d7c8e0f3cbaff0bcb1bcd95a1a1db24b16 (opens in a new tab)
- git.kernel.org/stable/c/4e942da2869bcd646353eef706b7dd82efeb9db5 (opens in a new tab)
- git.kernel.org/stable/c/6afb29751ee731e7f7a96feb8a15f91441e552ba (opens in a new tab)
- git.kernel.org/stable/c/a1ef9bddfbb3ae42b036c5aa16cf386d78db70b6 (opens in a new tab)
- git.kernel.org/stable/c/a56773e649ea99b344d6bbaf90f34c8e3fadef5d (opens in a new tab)
- git.kernel.org/stable/c/af4c0606f743e009254a8d252096855335ade85d (opens in a new tab)
- git.kernel.org/stable/c/d0756a98277e383c26fead988a96c91f0781cd7f (opens in a new tab)
- git.kernel.org/stable/c/e886c63d2ca7108826076989103a1ffa8a0bb8f4 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80803 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80803 (opens in a new tab)
- git.kernel.org/linus/344a56d7c8e0f3cbaff0bcb1bcd95a1a1db24b16 (opens in a new tab)