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CVE-2026-98006

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, 7.2.7, 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, <a3bbd2845bc7188ae18548a591da1067af997e80, 6.18.53, <402a9d6aab7ac787ab075adeb562c3db8b8f564b, 0, 5.10.271, <671037b282eb7fe477136bd0130ffd9029eb8668, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <d41e6c1533f09b27fc562260d41417490d2b6084, <dbd3effcbdb85394d3c4bd5ee9df785a44303333, <d6dd3c915b0d02457711d8fbaa60efc52144557f, <=6.18.*, 5.15.222, <2.6.22, 2.6.22, <=7.2.*, <=*, <fbfbad728da2e95d6560e43266895de5c8e844b3, <=5.15.*, 6.12.111, <0c1b907d5db2f3508375776e5b78d69591aa5626, 7.3

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Decoupling ep1_in_urb in caiaq dev The epq_in_urb object belonging to the caiaq device is coupled within the struct snd_usb_caiaqdev. After usb_submit_urb(epq_in_urb, GFP_KERNEL) executes successfully, epq_in_urb is successfully added to the urbp_list queue of the dummy HCD driver (userspace specifies dummy_hcd as the HCD layer driver for the caiaq USB device). When init_card() calls snd_usb_caiaq_send_command() which subsequently fails due to a timeout, and proceeds to call snd_card_free() to release the card, the embedded ep1_in_urb object is also freed. When the dummy HCD driver detects that the URB has been unlinked, it returns the URB (by usb_hcd_giveback_urb()), which triggers [1]. Decouple the ep1_in_urb object from the struct snd_usb_caiaqdev and switch to using a pointer instead. Separately allocate and manage the memory for ep1_in_urb to prevent the release of the snd_card memory object from interfering with it. midi_out_urb has the same issue as ep1_in_urb and is handled in the same way. [1] BUG: KASAN: slab-use-after-free in usb_free_urb+0x24/0x120 drivers/usb/core/urb.c:96 Write of size 4 at addr ffff88803cee1050 by task ktimers/1/29 Call Trace: usb_free_urb+0x24/0x120 drivers/usb/core/urb.c:96 dummy_timer+0xaac/0x4d50 drivers/usb/gadget/udc/dummy_hcd.c:2019 __run_hrtimer kernel/time/hrtimer.c:2067 [inline] __hrtimer_run_queues+0x3eb/0xaf0 kernel/time/hrtimer.c:2124 hrtimer_run_softirq+0x1e1/0x2e0 kernel/time/hrtimer.c:2141 Allocated by task 36: snd_card_new+0x7b/0x110 sound/core/init.c:184 create_card sound/usb/caiaq/device.c:429 [inline] snd_probe+0x236/0x1af0 sound/usb/caiaq/device.c:544 Freed by task 36: snd_card_free_when_closed sound/core/init.c:630 [inline] snd_card_free+0x138/0x1d0 sound/core/init.c:662 snd_probe+0x162b/0x1af0 sound/usb/caiaq/device.c:553

Gravité et risque d'exploitation

CVE-2026-98006 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 0.18 %, ce qui la place devant 6.7 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 7.2.7, 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, <a3bbd2845bc7188ae18548a591da1067af997e80, 6.18.53, <402a9d6aab7ac787ab075adeb562c3db8b8f564b, 0, 5.10.271, <671037b282eb7fe477136bd0130ffd9029eb8668, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <d41e6c1533f09b27fc562260d41417490d2b6084, <dbd3effcbdb85394d3c4bd5ee9df785a44303333, <d6dd3c915b0d02457711d8fbaa60efc52144557f, <=6.18.*, 5.15.222, <2.6.22, 2.6.22, <=7.2.*, <=*, <fbfbad728da2e95d6560e43266895de5c8e844b3, <=5.15.*, 6.12.111, <0c1b907d5db2f3508375776e5b78d69591aa5626, 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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