CVE-2026-80796: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80796DEBIAN-CVE-2026-80796
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80796 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.7% 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
0.19%
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 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11773-1

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: nci: add data_len bound checks to activation parameter extractors nci_extract_activation_params_iso_dep() and nci_extract_activation_params_nfc_dep() read an inner length byte from the NCI RF_INTF_ACTIVATED_NTF payload and use it to memcpy() into fixed kernel buffers, but neither function receives the caller-validated activation_params_len. A crafted NCI notification with activation_params_len=1 and an inner length byte of up to 20 (NFC-A) or 50 (NFC-B) causes memcpy() to read that many bytes past the one valid byte in the activation params region -- a slab out-of-bounds read of kernel memory adjacent to the NCI skb. The sibling nci_extract_rf_params_*() family was given equivalent protection by commit 571dcbeb8e63 ("net: nfc: nci: Fix parameter validation for packet data"), but the two activation parameter extractors were not updated at that time. Add a data_len parameter to both functions, guard against an empty region before consuming the inner length byte, decrement the remaining count after consuming it, and clamp the copy length to what is actually available. Update both call sites to pass ntf.activation_params_len, which is already validated against the skb at ntf.c:801.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

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

Ubuntu169 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 | < 6.12.111-1 | < 7.1.12-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < 1168484fe2b3828bf24a46f3c42a8719fade679b | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < be311c0cfeadfbe815ea22d2914a98d06e3fab0e | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < 04e51353cb9fa321caaeeed8331d4cd041fbaca7 | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300 | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < 9b01f5af0dc59263b59391b148bc78d83c0354a9 | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < 9620a91f8d643b680f417a435db399a04d1e06d8 | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < cf9d44be50b9074a5abdc301b4a3ba3e283591df | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < f5c534b53f8c424a8e7633c9b585475c4bf4ee18 | ≥ e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, < 0428fa2c22e2ba0cff766d3b80d461e149102045 | 3.3

3 vendors · 172 products

References

13 links
Show all 13 references