CVE-2026-80798: nfc: llcp: reject PDUs shorter than the LLCP header

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 8.1

Published

2026-09-08

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80798

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-807980.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[UPDATE] [hoch] Linux Kernel: Mehrere Schwachstellencert-bund
• unknownCVE-2026-80798: In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: reject PDUs sho…nvd

Recent advisories for nfc

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• medium[NEU] [mittel] QT (NFC-Modul): Schwachstelle ermöglicht DoS and die Offenlegung von Informationencert-bund · 2026-09-11
• unknownCVE-2026-13326: An out-of-bounds read in Qt NFC's language code length parsing allows a physically proximate a…nvd · 2026-09-11
• mediumCVE-2026-80802: nfc: fdp: bound the device-reported read length and fix an skb leakmsrc · 2026-09-08
• highCVE-2026-80800: nfc: llcp: bound the connect_sn TLV walk to the skbmsrc · 2026-09-08
• mediumCVE-2026-80801: nfc: microread: validate target discovery payload lengthsmsrc · 2026-09-08
• lowCVE-2026-80797: nfc: pn533: purge fragmented skbs during cleanupmsrc · 2026-09-08

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