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CVE-2026-31434

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <94054ffd311a1f76b7093ba8ebf50bdb0d28337c, <=6.12.*, 190d5a7c4fe42b8c9aa46e3336389e7cb10395bb, 0, 7.0, 6.12.67, <6.1.168, 64c7ddda83acfbaa0efb381a1928ce908c584607, <3c844d01f9874a43004c82970d8da94f9aba8949, <a4376d9a5d4c9610e69def3fc0b32c86a7ab7a41, <3c645c6f7e5470debbb81666b230056de48f36dc, <=6.6.*, 6.19.11, <=6.19.*, 6.16, 6.1.162, <6.12.80, <=6.18.*, 6.6.131, 6.12.80, 0bd151ce4200ca847990e05cca29a76456982ca5, <6.16, <6.6.131, <=*, f92ee31e031c7819126d2febdda0c3e91f5d2eb9, <416484f21a9d1280cf6daa7ebc10c79b59c46e48, <1737ddeafbb1304f41ec2eede4f7366082e7c96a, 6.1.168, 6.6.122, 6.18.21

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix leak of kobject name for sub-group space_info When create_space_info_sub_group() allocates elements of space_info->sub_group[], kobject_init_and_add() is called for each element via btrfs_sysfs_add_space_info_type(). However, when check_removing_space_info() frees these elements, it does not call btrfs_sysfs_remove_space_info() on them. As a result, kobject_put() is not called and the associated kobj->name objects are leaked. This memory leak is reproduced by running the blktests test case zbd/009 on kernels built with CONFIG_DEBUG_KMEMLEAK. The kmemleak feature reports the following error: unreferenced object 0xffff888112877d40 (size 16): comm "mount", pid 1244, jiffies 4294996972 hex dump (first 16 bytes): 64 61 74 61 2d 72 65 6c 6f 63 00 c4 c6 a7 cb 7f data-reloc...... backtrace (crc 53ffde4d): __kmalloc_node_track_caller_noprof+0x619/0x870 kstrdup+0x42/0xc0 kobject_set_name_vargs+0x44/0x110 kobject_init_and_add+0xcf/0x150 btrfs_sysfs_add_space_info_type+0xfc/0x210 [btrfs] create_space_info_sub_group.constprop.0+0xfb/0x1b0 [btrfs] create_space_info+0x211/0x320 [btrfs] btrfs_init_space_info+0x15a/0x1b0 [btrfs] open_ctree+0x33c7/0x4a50 [btrfs] btrfs_get_tree.cold+0x9f/0x1ee [btrfs] vfs_get_tree+0x87/0x2f0 vfs_cmd_create+0xbd/0x280 __do_sys_fsconfig+0x3df/0x990 do_syscall_64+0x136/0x1540 entry_SYSCALL_64_after_hwframe+0x76/0x7e To avoid the leak, call btrfs_sysfs_remove_space_info() instead of kfree() for the elements.

Gravité et risque d'exploitation

CVE-2026-31434 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 0.16 %, ce qui la place devant 5.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <94054ffd311a1f76b7093ba8ebf50bdb0d28337c, <=6.12.*, 190d5a7c4fe42b8c9aa46e3336389e7cb10395bb, 0, 7.0, 6.12.67, <6.1.168, 64c7ddda83acfbaa0efb381a1928ce908c584607, <3c844d01f9874a43004c82970d8da94f9aba8949, <a4376d9a5d4c9610e69def3fc0b32c86a7ab7a41, <3c645c6f7e5470debbb81666b230056de48f36dc, <=6.6.*, 6.19.11, <=6.19.*, 6.16, 6.1.162, <6.12.80, <=6.18.*, 6.6.131, 6.12.80, 0bd151ce4200ca847990e05cca29a76456982ca5, <6.16, <6.6.131, <=*, f92ee31e031c7819126d2febdda0c3e91f5d2eb9, <416484f21a9d1280cf6daa7ebc10c79b59c46e48, <1737ddeafbb1304f41ec2eede4f7366082e7c96a, 6.1.168, 6.6.122, 6.18.21) 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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