Heimdall Security Logo

CVE-2026-64594

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <d5631081be07f20e764d3cb5c98ac0a1004fba51, <ba1867999dbc4085e6d8c52ac5266005b8b2bf07, <3137b243c93982fe3460335e12f9247739766e10, <=6.1.*, 6.18.40, <=6.12.*, <7fe895e0a9651518c4fc082487da770ff9c14c7f, <c36393b0d14e1e9783888f821ffe29381b8f46dc, <0de6ebbabfbbc9c28350283dc97d8a519d5c6dd7, 0, <=7.1.*, 7.1.4, <4.0, 6.1.178, <=5.10.*, <=6.6.*, 6.12.97, 4.0, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, 18d6b32fca3841f7cd9479b4024abd8a9b299281, <=*, <cb19e54ebe9baf3c3243083ade65c937339ccb7b, <=5.15.*, 7.2, <69faa3779250df14f51d5084f938a99809546e52

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: initialize reset_work at allocation time ffs_fs_kill_sb() unconditionally calls cancel_work_sync() on ffs->reset_work when a functionfs instance is unmounted: ffs_data_reset(ffs); cancel_work_sync(&ffs->reset_work); However ffs->reset_work is only ever initialized via INIT_WORK() in ffs_func_set_alt() and ffs_func_disable(), and only on the FFS_DEACTIVATED path. That state is reached solely by ffs_data_closed() when the instance is mounted with the "no_disconnect" option, so for the common case (no "no_disconnect", or mounted and unmounted without ever being deactivated) reset_work is never initialized. ffs_data_new() allocates the ffs_data with kzalloc_obj() and does not initialize reset_work, and ffs_data_reset()/ffs_data_clear() do not touch it either, so reset_work.func is left NULL. cancel_work_sync() on such a work then trips the WARN_ON(!work->func) guard in __flush_work(): WARNING: kernel/workqueue.c:4301 at __flush_work+0x330/0x360, CPU#3: umount Call trace: __flush_work cancel_work_sync ffs_fs_kill_sb [usb_f_fs] deactivate_locked_super deactivate_super cleanup_mnt __cleanup_mnt task_work_run exit_to_user_mode_loop el0_svc On older kernels cancel_work_sync() on a zero-initialized work struct was a silent no-op, which hid the missing initialization. Initialize reset_work once in ffs_data_new() so it is always valid for the lifetime of the ffs_data, and drop the now-redundant INIT_WORK() calls from the two deactivation paths.

Gravité et risque d'exploitation

CVE-2026-64594 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 0.17 %, ce qui la place devant 5.3 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <d5631081be07f20e764d3cb5c98ac0a1004fba51, <ba1867999dbc4085e6d8c52ac5266005b8b2bf07, <3137b243c93982fe3460335e12f9247739766e10, <=6.1.*, 6.18.40, <=6.12.*, <7fe895e0a9651518c4fc082487da770ff9c14c7f, <c36393b0d14e1e9783888f821ffe29381b8f46dc, <0de6ebbabfbbc9c28350283dc97d8a519d5c6dd7, 0, <=7.1.*, 7.1.4, <4.0, 6.1.178, <=5.10.*, <=6.6.*, 6.12.97, 4.0, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, 18d6b32fca3841f7cd9479b4024abd8a9b299281, <=*, <cb19e54ebe9baf3c3243083ade65c937339ccb7b, <=5.15.*, 7.2, <69faa3779250df14f51d5084f938a99809546e52) 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

Rechercher une autre CVE