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CVE-2026-72478

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.4 · Élevée
EPSS 0.2%
Linux•Linux•Versions : 7.0.4, <=6.1.*, 7.1.5, 6.18.40, <=6.12.*, bbad75336870b51b81979b97613746237fcb02fe, <c23083b472a720c3f60b147db05b25b751c7c1bf, b62567bca47408e6739dee75f02a2113548af875, 6.18.27, 0, <=7.1.*, <8afc24a884aff6a6f08028bd779ee65c40054455, <7.1, <bb11485a87fbb2254b62cfed630b699d50e57da8, bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9, 5.15.209, 6.1.178, 6.12.97, <=6.6.*, 6.1.175, <6.1.178, e64f7dfcaff79e7dfff9121a382dd77f9b462f62, <6.18.40, <5.16, 7.1, <=6.18.*, 6.6.145, <41081202eb823f5b27ff164b12010b24428100ad, 425de2aba0d061b3e715d51a3b1992c112ed5b99, <6.6.145, d3012690a7065d9ca86521a525ad11e8af491d45, <=*, <c69b9003332917b652175d5fa9d84158c5ed8617, 41aadf5cb482793a24e05aa136224e179a778586, <a31893206588374d7d16fad387189d8165c7efd3, 6.6.140, <6.12.97, 6.12.86, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: add bounds check to run_get_highest_vcn() run_get_highest_vcn() parses a packed NTFS mapping-pairs buffer without any length bound, relying solely on a 0x00 terminator to stop. A crafted $LogFile UpdateMappingPairs record whose embedded attribute contains mapping-pairs runs without a terminator causes the function to read past the slab allocation, triggering a KASAN slab-out-of-bounds read on mount. The sibling function run_unpack() received an analogous bounds-check in commit b62567bca474 ("ntfs3: add buffer boundary checks to run_unpack()"), but run_get_highest_vcn() was missed. Take a run_buf_size parameter and reject any run header whose payload would extend past the buffer end, mirroring the pattern used by run_unpack(). The caller in fslog.c passes the remaining attribute bytes after the mapping-pairs offset. KASAN report (on mainline v7.1 merge window HEAD): BUG: KASAN: slab-out-of-bounds in run_get_highest_vcn+0x3c0/0x410 Read of size 1 at addr ffff88800e2d5400 by task mount/72 Call Trace: run_get_highest_vcn+0x3c0/0x410 do_action.isra.0+0x3ba8/0x7b50 log_replay+0x9ddd/0x10200 ntfs_loadlog_and_replay+0x4ad/0x610 ntfs_fill_super+0x214a/0x4540

Gravité et risque d'exploitation

CVE-2026-72478 obtient un score CVSS de 8.4/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.20 %, ce qui la place devant 8.7 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 7.0.4, <=6.1.*, 7.1.5, 6.18.40, <=6.12.*, bbad75336870b51b81979b97613746237fcb02fe, <c23083b472a720c3f60b147db05b25b751c7c1bf, b62567bca47408e6739dee75f02a2113548af875, 6.18.27, 0, <=7.1.*, <8afc24a884aff6a6f08028bd779ee65c40054455, <7.1, <bb11485a87fbb2254b62cfed630b699d50e57da8, bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9, 5.15.209, 6.1.178, 6.12.97, <=6.6.*, 6.1.175, <6.1.178, e64f7dfcaff79e7dfff9121a382dd77f9b462f62, <6.18.40, <5.16, 7.1, <=6.18.*, 6.6.145, <41081202eb823f5b27ff164b12010b24428100ad, 425de2aba0d061b3e715d51a3b1992c112ed5b99, <6.6.145, d3012690a7065d9ca86521a525ad11e8af491d45, <=*, <c69b9003332917b652175d5fa9d84158c5ed8617, 41aadf5cb482793a24e05aa136224e179a778586, <a31893206588374d7d16fad387189d8165c7efd3, 6.6.140, <6.12.97, 6.12.86, 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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