CVE-2026-80799: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80799DEBIAN-CVE-2026-80799
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80799 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.4% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 6
MGASA-2026-0506OPENSUSE-SU-2026:11773-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix OOB read and u8 offset wrap in TLV parsers nfc_llcp_parse_gb_tlv() and nfc_llcp_parse_connection_tlv() contain three related bugs in their TLV parsing loops: 1. 'offset' is declared u8 but tlv_array_len is u16. When TLV data advances offset past 255 it silently wraps to zero, causing infinite loops or double-processing of buffer data. 2. Before reading tlv[0] (type) and tlv[1] (length) there is no check that offset+2 <= tlv_array_len. A truncated TLV causes an OOB read of one byte past the buffer end. 3. After reading the length field, the value bytes are accessed without checking offset+2+length <= tlv_array_len. A crafted length=0xFF on a short buffer causes up to 255 bytes of OOB read past the buffer end. Both functions are reachable without authentication via nfc_llcp_set_remote_gb() which feeds remote LLCP general bytes directly into nfc_llcp_parse_gb_tlv() with no additional validation. Fix all three issues by widening offset from u8 to u16 and adding bounds checks for both the TLV header and value field before each access.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu165 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.107-1 | < 7.1.12-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 0be9de2ea01e8d52646e7310a7eef5459cf07ea8, < 2c1456fe09ab1a5a9fe1d8339ca6d509589b56e1 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 7f6f3d087c67a4346189ef2c36481455bbc59a74 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 9c47d667963542c3cf8e3007b7f10c0904d08238 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < a209334ed929941b20810c17c3a507445b0a7c85 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 382eaa770335acf4f16a5a55524500f2bb4207df | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 2d239590d1845a706304833d40dd6d4fec20ad88 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < e84cdfdc4a6c88e8b751144458f2e04e24415a28 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 875285a165fd3b402de2ab3be0deb355d6f4caf5 | ≥ 3df40eb3a2ea58bf404a38f15a7a2768e4762cb0, < 78b20c8eeacd2e44a2d8a4cb5316d3c521d90911 | 1deacb5e031e289ca5636f2db4fcae6612c05d34 | 66a1be74230bbe098e651766c9a0cf4038db8442 | ≥ 5.10.188, < 5.10.267 | ≥ 4.19.291, < 4.20 | ≥ 5.4.251, < 5.5 | 5.15

3 vendors · 168 products

References

13 links
Show all 13 references