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CVE-2025-40134

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <=6.12.*, 6.12.53, 6.17.3, 0, <846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe, <30f95b7eda5966b81cb221bd569c0f095a068cf6, <19ca4528666990be376ac3eb6fe667b03db5324d, 6.18, <=5.10.*, <=6.6.*, 5.0, <=5.4.*, <a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c, <5.0, 5.15.195, 5.10.246, <9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98, <a802901b75e13cc306f1b7ab0f062135c8034e9e, <=*, 6.6.112, <=5.15.*, 6.1.156, <=6.17.*, 5.4.301, c4576aed8d85d808cd6443bda58393d525207d01, <8d33a030c566e1f105cd5bf27f37940b6367f3be, <331c2dd8ca8bad1a3ac10cce847ffb76158eece4

Description

In the Linux kernel, the following vulnerability has been resolved: dm: fix NULL pointer dereference in __dm_suspend() There is a race condition between dm device suspend and table load that can lead to null pointer dereference. The issue occurs when suspend is invoked before table load completes: BUG: kernel NULL pointer dereference, address: 0000000000000054 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 6 PID: 6798 Comm: dmsetup Not tainted 6.6.0-g7e52f5f0ca9b #62 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 RIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50 Call Trace: <TASK> blk_mq_quiesce_queue+0x2c/0x50 dm_stop_queue+0xd/0x20 __dm_suspend+0x130/0x330 dm_suspend+0x11a/0x180 dev_suspend+0x27e/0x560 ctl_ioctl+0x4cf/0x850 dm_ctl_ioctl+0xd/0x20 vfs_ioctl+0x1d/0x50 __se_sys_ioctl+0x9b/0xc0 __x64_sys_ioctl+0x19/0x30 x64_sys_call+0x2c4a/0x4620 do_syscall_64+0x9e/0x1b0 The issue can be triggered as below: T1 T2 dm_suspend table_load __dm_suspend dm_setup_md_queue dm_mq_init_request_queue blk_mq_init_allocated_queue => q->mq_ops = set->ops; (1) dm_stop_queue / dm_wait_for_completion => q->tag_set NULL pointer! (2) => q->tag_set = set; (3) Fix this by checking if a valid table (map) exists before performing request-based suspend and waiting for target I/O. When map is NULL, skip these table-dependent suspend steps. Even when map is NULL, no I/O can reach any target because there is no table loaded; I/O submitted in this state will fail early in the DM layer. Skipping the table-dependent suspend logic in this case is safe and avoids NULL pointer dereferences.

Gravité et risque d'exploitation

CVE-2025-40134 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 0.23 %, ce qui la place devant 12.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <=6.12.*, 6.12.53, 6.17.3, 0, <846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe, <30f95b7eda5966b81cb221bd569c0f095a068cf6, <19ca4528666990be376ac3eb6fe667b03db5324d, 6.18, <=5.10.*, <=6.6.*, 5.0, <=5.4.*, <a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c, <5.0, 5.15.195, 5.10.246, <9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98, <a802901b75e13cc306f1b7ab0f062135c8034e9e, <=*, 6.6.112, <=5.15.*, 6.1.156, <=6.17.*, 5.4.301, c4576aed8d85d808cd6443bda58393d525207d01, <8d33a030c566e1f105cd5bf27f37940b6367f3be, <331c2dd8ca8bad1a3ac10cce847ffb76158eece4) 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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