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2026年9月18日

CVE-2026-90223 – In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: bound SNL

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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 = 1) and SDRES (exactly 2).

Found by 0sec automated security-research tooling (https://0sec.ai).