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CVE-2026-98483

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : 6.3.13, e5207c1d69b1a9707615ab6ff9376e59fc096815, <=6.1.*, <=6.12.*, 5.4.251, <6.5, 6.18.55, 6709d4b7bc2e079241fdef15d1160581c5261c10, 0, <9ede11e12f965ace97c4e0f606667f24fb41e7e1, <5.10.271, 96f2c6f272ec04083d828de46285a7d7b17d1aad, 5.15.121, 6.12.112, 5.10.271, 6.5, 6.6.158, <=5.10.*, <=6.6.*, <2b31d0cc95856c856ada91f943fb14dfdf29a923, 6.1.189, <6.4, 425d9d3a92df7d96b3cfb7ee5c240293a21cbde3, <5.15.222, <d8c929e9afdbc33b1876ecb97a517e850449b5bd, <5.5, dd6ff3f3862709ab1a12566e73b9d6a9b8f6e548, <25bfa673adc70189c0bc872940421ae59f789cf6, b3ad46e155a6d91b36c6e892019a43e3ef3c696d, fc8429f8d86801f092fbfbd257c3af821ac0dcd3, 5.15.222, <=6.18.*, <dcab71a7011918f6fdba7adcec02d217dcb84b8d, <=7.2.*, <6.1.189, 7.2.9, 6.4.4, <=*, <=5.15.*, <c40f61a6a413f3eaf028e5fe367fd9749e503ab0, 5.10.188, <19bcfc2a56d0b82919079b5424c5a9a0ac897dcf, <841af260ff477f6191872bc3b2e15488615c1827, 6.1.39, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: fix use-after-free in nfc_get_local_general_bytes Commit 6709d4b7bc2e ("net: nfc: Fix use-after-free caused by nfc_llcp_find_local") attempted to fix a use-after-free (UAF) issue by invoking nfc_llcp_local_put(local) after accessing local->gb. However, if the reference count drops to zero, local is freed immediately, leading to a use-after-free when callers access the returned pointer. Alternative approaches using dynamic allocation (e.g. kmemdup) introduced memory leaks because callers consistently treat the returned pointer as borrowed memory. Fix this properly by refactoring nfc_llcp_general_bytes() and nfc_get_local_general_bytes() to accept a caller-provided output buffer (out_gb) and its maximum length (gb_max_len). The general bytes are safely copied into out_gb before calling nfc_llcp_local_put(local), ensuring safe lifetime management without ownership transfer complications. Update all callers across drivers (microread, pn533, pn544, st21nfca, digital_dep, and nci) to provide their own destination buffers and pass them to nfc_get_local_general_bytes().

Gravité et risque d'exploitation

CVE-2026-98483 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 0.21 %, ce qui la place devant 10.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.3.13, e5207c1d69b1a9707615ab6ff9376e59fc096815, <=6.1.*, <=6.12.*, 5.4.251, <6.5, 6.18.55, 6709d4b7bc2e079241fdef15d1160581c5261c10, 0, <9ede11e12f965ace97c4e0f606667f24fb41e7e1, <5.10.271, 96f2c6f272ec04083d828de46285a7d7b17d1aad, 5.15.121, 6.12.112, 5.10.271, 6.5, 6.6.158, <=5.10.*, <=6.6.*, <2b31d0cc95856c856ada91f943fb14dfdf29a923, 6.1.189, <6.4, 425d9d3a92df7d96b3cfb7ee5c240293a21cbde3, <5.15.222, <d8c929e9afdbc33b1876ecb97a517e850449b5bd, <5.5, dd6ff3f3862709ab1a12566e73b9d6a9b8f6e548, <25bfa673adc70189c0bc872940421ae59f789cf6, b3ad46e155a6d91b36c6e892019a43e3ef3c696d, fc8429f8d86801f092fbfbd257c3af821ac0dcd3, 5.15.222, <=6.18.*, <dcab71a7011918f6fdba7adcec02d217dcb84b8d, <=7.2.*, <6.1.189, 7.2.9, 6.4.4, <=*, <=5.15.*, <c40f61a6a413f3eaf028e5fe367fd9749e503ab0, 5.10.188, <19bcfc2a56d0b82919079b5424c5a9a0ac897dcf, <841af260ff477f6191872bc3b2e15488615c1827, 6.1.39, 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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