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CVE-2026-64361

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.1%
Linux•Linux•Versions : fe2891a9c43ab87d1a210d61e6438ca6936e2f62, <=6.1.*, 6.18.40, <=6.12.*, eec522fd0d28106b14a59ab2d658605febe4a3bb, a431930c9bac518bf99d6b1da526a7f37ddee8d8, <7399c3baee7bb622a92f0b895cd4d3009a693f2b, <5.15.212, 6.17, 0, <671c3fcc2ad31c1311ea6414382a2d95104ae1b9, <=7.1.*, 7.1.4, a1a60e79502279f996e55052f50cc14919020475, 6.6.103, 5.4.297, 67ecc81f6492275c9c54280532f558483c99c90e, <607217f7ad419b53926f71e3f75001813bbc08ad, 6.1.178, <966cb76fb2857a4242cab6ea2ea17acf818a3da7, <=5.10.*, <=6.6.*, 6.12.97, <6.1.178, 384a66b89f9540a9a8cb0f48807697dfabaece4c, <fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1, fc7f732984ec91f30be3e574e0644066d07f2b78, 5.15.190, 6.12.43, <5.5, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <c8dd112173c02adf539fe2ad34a45f5e0068780d, 6.1.149, <6.17, <5.10.261, 6.16.2, <6.6.145, <b6a481642ea1977be2f84dc08c5affd742c177e7, <6.16, <c25d3c931a63e762fcaa9cb125b901c53b62403f, 5.10.241, <=*, <=5.15.*, e7d2dc2421e821e4045775e6dc226378328de6f6, efc095b35b23297e419c2ab4fc1ed1a8f0781a29, <6.12.97, 6.15.11, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail. For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer. Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward.

Gravité et risque d'exploitation

CVE-2026-64361 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.13 %, ce qui la place devant 2.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions fe2891a9c43ab87d1a210d61e6438ca6936e2f62, <=6.1.*, 6.18.40, <=6.12.*, eec522fd0d28106b14a59ab2d658605febe4a3bb, a431930c9bac518bf99d6b1da526a7f37ddee8d8, <7399c3baee7bb622a92f0b895cd4d3009a693f2b, <5.15.212, 6.17, 0, <671c3fcc2ad31c1311ea6414382a2d95104ae1b9, <=7.1.*, 7.1.4, a1a60e79502279f996e55052f50cc14919020475, 6.6.103, 5.4.297, 67ecc81f6492275c9c54280532f558483c99c90e, <607217f7ad419b53926f71e3f75001813bbc08ad, 6.1.178, <966cb76fb2857a4242cab6ea2ea17acf818a3da7, <=5.10.*, <=6.6.*, 6.12.97, <6.1.178, 384a66b89f9540a9a8cb0f48807697dfabaece4c, <fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1, fc7f732984ec91f30be3e574e0644066d07f2b78, 5.15.190, 6.12.43, <5.5, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <c8dd112173c02adf539fe2ad34a45f5e0068780d, 6.1.149, <6.17, <5.10.261, 6.16.2, <6.6.145, <b6a481642ea1977be2f84dc08c5affd742c177e7, <6.16, <c25d3c931a63e762fcaa9cb125b901c53b62403f, 5.10.241, <=*, <=5.15.*, e7d2dc2421e821e4045775e6dc226378328de6f6, efc095b35b23297e419c2ab4fc1ed1a8f0781a29, <6.12.97, 6.15.11, 7.2) 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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