CVE-2026-80796nfc: nci: add data_len bound checks to activation parameter extractors
- —Not scoredno CVSS score yet
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 9 days later
· 9 days later
Published
- 45 days later
· 45 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < 1168484fe2b3828bf24a46f3c42a8719fade679b
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < be311c0cfeadfbe815ea22d2914a98d06e3fab0e
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < 04e51353cb9fa321caaeeed8331d4cd041fbaca7
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < 9b01f5af0dc59263b59391b148bc78d83c0354a9
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < 9620a91f8d643b680f417a435db399a04d1e06d8
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < cf9d44be50b9074a5abdc301b4a3ba3e283591df
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < f5c534b53f8c424a8e7633c9b585475c4bf4ee18
- affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 – < 0428fa2c22e2ba0cff766d3b80d461e149102045
- affected 3.3
- unaffected < 3.3
- unaffected 5.10.269 – ≤ 5.10.*
- unaffected 5.15.220 – ≤ 5.15.*
- unaffected 6.1.187 – ≤ 6.1.*
- unaffected 6.6.156 – ≤ 6.6.*
- unaffected 6.12.108 – ≤ 6.12.*
- unaffected 6.18.47 – ≤ 6.18.*
- unaffected 7.1.11 – ≤ 7.1.*
- unaffected 7.2.1 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References9
- https://git.kernel.org/stable/c/1168484fe2b3828bf24a46f3c42a8719fade679b (opens in a new tab)
- https://git.kernel.org/stable/c/be311c0cfeadfbe815ea22d2914a98d06e3fab0e (opens in a new tab)
- https://git.kernel.org/stable/c/04e51353cb9fa321caaeeed8331d4cd041fbaca7 (opens in a new tab)
- https://git.kernel.org/stable/c/e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300 (opens in a new tab)
- https://git.kernel.org/stable/c/9b01f5af0dc59263b59391b148bc78d83c0354a9 (opens in a new tab)
- https://git.kernel.org/stable/c/9620a91f8d643b680f417a435db399a04d1e06d8 (opens in a new tab)
- https://git.kernel.org/stable/c/cf9d44be50b9074a5abdc301b4a3ba3e283591df (opens in a new tab)
- https://git.kernel.org/stable/c/f5c534b53f8c424a8e7633c9b585475c4bf4ee18 (opens in a new tab)
- https://git.kernel.org/stable/c/0428fa2c22e2ba0cff766d3b80d461e149102045 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-71439 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-80796)Record last updated .