Unknown

CVE-2026-80802 — nfc: fdp: bound the device-reported read length and fix an skb leak

In the Linux kernel, the following vulnerability has been resolved: nfc: fdp: bound the device-reported read length and fix an skb leak fdp_nci_i2c_read() takes the next packet length from two device-supplied bytes and never validates it. The value is a u16 used as the i2c_master_recv() count into a 261-byte on-stack buffer: a malicious, counterfeit or malfunctioning controller (or an i2c bus interposer) can drive it far past the buffer for a stack out-of-bounds write that clobbers the canary and return address, or below the minimum frame size (directly, or by truncating the computed sum) so the header/LRC strip and the next length read run past a short receive. Reject a length outside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a corrupted packet already is, and force resynchronization. The same loop allocates one data skb per iteration and assumes a length packet followed by a data packet; a device that sends two data packets in one call leaks the first skb when the second allocation overwrites it. Free a previously allocated skb before allocating the next.

Published Sep 4, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.24%

ahead of 15% of scored CVEs · Oct 26, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < 1fc32327b927a6e2cde086f82575c29880844228≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < 8d2c243b79854628ff076c38748c020042f02f57≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < 0d723090645b82c1cb27cfd7ebf81f0e7c96bcae≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < db7e464b350969c6ea8340de00d9796e5fd5123b≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < e5eec121f2c3bc4c7022613bedd9121a8aa4c949≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < 1aa3fc769b0c45bd19f8dab1697084c2b3f6d706 and 2 more ≥ a06347c04c13e380afce0c9816df51f00b83faf1 and < 7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1version 4.4	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 26, 2026 · 11 reading(s) · max 0.24%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 4, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

11 on the record

git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b
NIST National Vulnerability Database
git.kernel.org/stable/c/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee
NIST National Vulnerability Database
git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae
NIST National Vulnerability Database
git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-80802
GitHub Security Advisories
git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57
NIST National Vulnerability Database
git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949
NIST National Vulnerability Database
github.com/advisories/GHSA-6fmj-x4q6-pp6w
GitHub Security Advisories
git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228
NIST National Vulnerability Database
git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1
NIST National Vulnerability Database
git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 14h
Unknown CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 14h
Unknown CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 14h
Unknown CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 14h
Unknown CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 14h
Unknown CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 14h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80802 is "nfc: fdp: bound the device-reported read length and fix an skb leak", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.24% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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