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CVE-2026-80796

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : 7.2.1, <=6.1.*, 7.1.11, <=6.12.*, 6.6.156, 5.10.269, <9620a91f8d643b680f417a435db399a04d1e06d8, <cf9d44be50b9074a5abdc301b4a3ba3e283591df, 0, <=7.1.*, <be311c0cfeadfbe815ea22d2914a98d06e3fab0e, <e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300, e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, <04e51353cb9fa321caaeeed8331d4cd041fbaca7, <9b01f5af0dc59263b59391b148bc78d83c0354a9, <3.3, <=5.10.*, <=6.6.*, <f5c534b53f8c424a8e7633c9b585475c4bf4ee18, <=6.18.*, 3.3, <1168484fe2b3828bf24a46f3c42a8719fade679b, 6.18.47, <0428fa2c22e2ba0cff766d3b80d461e149102045, <=7.2.*, 5.15.220, <=*, <=5.15.*, 6.12.108, 6.1.187, 7.3

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.

Gravité et risque d'exploitation

CVE-2026-80796 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.19 %, ce qui la place devant 8.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 7.2.1, <=6.1.*, 7.1.11, <=6.12.*, 6.6.156, 5.10.269, <9620a91f8d643b680f417a435db399a04d1e06d8, <cf9d44be50b9074a5abdc301b4a3ba3e283591df, 0, <=7.1.*, <be311c0cfeadfbe815ea22d2914a98d06e3fab0e, <e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300, e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20, <04e51353cb9fa321caaeeed8331d4cd041fbaca7, <9b01f5af0dc59263b59391b148bc78d83c0354a9, <3.3, <=5.10.*, <=6.6.*, <f5c534b53f8c424a8e7633c9b585475c4bf4ee18, <=6.18.*, 3.3, <1168484fe2b3828bf24a46f3c42a8719fade679b, 6.18.47, <0428fa2c22e2ba0cff766d3b80d461e149102045, <=7.2.*, 5.15.220, <=*, <=5.15.*, 6.12.108, 6.1.187, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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