CVE-2026-90223 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20507317
- published5 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-90223 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
nfc: llcp: bound SNL TLV parsing to the skb and add length checks
nfc_llcp_recv_snl() walked the SNL TLV list using a u16 offset/length pair derived from skb->len, without bounding reads to the actual skb data. Three problems followed:
- For a short frame (skb->len < LLCP_HEADER_SIZE), tlv_len underflowed.
- The per-TLV header (type, length) was read without checking that two bytes remained.
- A declared TLV length could run past the end of the buffer, and an SDREQ with length == 0 made "service_name_len = length - 1" underflow (size_t), driving an out-of-bounds read in the following strncmp() / nfc_llcp_sock_from_sn(). The SDRES case likewise read tlv[2]/tlv[3] without a length check.
A nearby NFC device can reach this without authentication; LLCP link activation happens automatically after NFC-DEP.
Walk the TLV list by pointer, bounded by skb_tail_pointer() over the linear skb data, and validate each TLV declared length before use. Add explicit length checks for SDREQ (>= 1) and SDRES (exactly 2).
Found by 0sec automated security-research tooling (https://0sec.ai).
References
- https://security-tracker.debian.org/tracker/CVE-2026-90223
- https://git.kernel.org/stable/c/02030f95820c42431280f4f945ff34247fb840ff
- https://git.kernel.org/stable/c/587fc2a5a35b41883b22b8f808fe5d345208914b
- https://git.kernel.org/stable/c/749a9048bf51a668ec3ab6c0392ba32325607281
- https://git.kernel.org/stable/c/88b36d36e12c9ba76decdb580d9c1907c084e587
- https://git.kernel.org/stable/c/99fdb5c2522f365efa199d0117b641e35097041e
- https://git.kernel.org/stable/c/eeb16fb24cfe67947b832fd9ada5f488afc72579
- https://git.kernel.org/stable/c/f04ac9bf2379f3e2470c400c235eb12f74891bef
- https://git.kernel.org/stable/c/f4c7f37f0ab990952539dc68d931d65c3657600a