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CVE-2026-68222

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.1%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, <c74b680704baecea4620c0774de473069e0bc4e8, 6.12.101, <1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a, 0, 3.12, <=7.1.*, <2d10eedb786a13f91d76e11320fabb0bf712519f, 5.15.216, <=5.10.*, <=6.6.*, <bab9d5a67d4db96ae8c187b92b37979911302a10, <3673cb0a5711e910074d69201da9e1535c03f97a, 6.18.42, 7.1.6, 6.1.183, <=6.18.*, 977e444f59ad16eedf66acae4f357011c74da291, <2de14ddb4fea04ca616403a6ba81c5e8099e9b9e, <3.12, <264b5380c4f8aa92dbc2983ecd2b627f1d5e0061, <=*, <=5.15.*, 5.10.265, 6.6.148, 7.2, <7201c17786a498497bca57752883b90914d405ac

Description

In the Linux kernel, the following vulnerability has been resolved: media: msi2500: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. msi2500_start_streaming() had five error paths that all hit this trap and were further tangled by ret-overwriting between calls: - -ENODEV when the USB device was already disconnected - -ERESTARTSYS when mutex_lock_interruptible() was interrupted - msi2500_set_usb_adc() failure: ret was silently overwritten by the next call (msi2500_isoc_init), so the error was lost entirely - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but the function then fell through to msi2500_ctrl_msg() and again masked the original error by overwriting ret - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all, leaving isoc URBs submitted with no way for the driver to consume them Consolidate the error paths into a small goto chain. Every failure now stops the function, drains the queued-buffer list, and returns the real error code. The ctrl_msg failure path also rolls back the preceding msi2500_isoc_init() via msi2500_isoc_cleanup() before unlocking and draining. The cleanup helper takes a vb2_buffer_state argument so that the start_streaming error paths can pass VB2_BUF_STATE_QUEUED (as expected by userspace on start_streaming failure) while stop_streaming keeps its existing VB2_BUF_STATE_ERROR semantics. This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

Gravité et risque d'exploitation

CVE-2026-68222 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 0.14 %, ce qui la place devant 2.9 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <c74b680704baecea4620c0774de473069e0bc4e8, 6.12.101, <1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a, 0, 3.12, <=7.1.*, <2d10eedb786a13f91d76e11320fabb0bf712519f, 5.15.216, <=5.10.*, <=6.6.*, <bab9d5a67d4db96ae8c187b92b37979911302a10, <3673cb0a5711e910074d69201da9e1535c03f97a, 6.18.42, 7.1.6, 6.1.183, <=6.18.*, 977e444f59ad16eedf66acae4f357011c74da291, <2de14ddb4fea04ca616403a6ba81c5e8099e9b9e, <3.12, <264b5380c4f8aa92dbc2983ecd2b627f1d5e0061, <=*, <=5.15.*, 5.10.265, 6.6.148, 7.2, <7201c17786a498497bca57752883b90914d405ac) 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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