Heimdall Security Logo

CVE-2024-43914

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, 5.15.165, 0, <305a5170dc5cf3d395bb4c4e9239bca6d0b54b49, <4811d6e5d9f4090c3e0ff9890eb24077108046ab, 2.6.30, <=5.10.*, <=6.6.*, 5.4.282, <bf0ff69a42a3d2d46876d0514ecf13dffc516666, <=5.4.*, <2.6.30, <=4.19.*, <775a9ba16c9ffe98fe54ebf14e55d5660f2bf600, <c384dd4f1fb3b14a2fd199360701cc163ea88705, 5.10.224, 6.1.105, ec32a2bd35bd6b933a5db6542c48210ce069a376, 6.11, <=*, 4.19.320, <2c92f8c1c456d556f15cbf51667b385026b2e6a0, <=5.15.*, 6.6.46, <3b33740c1750a39e046339ff9240e954f0156707, <=6.10.*, <6b33c468d543f6a83de2d61f09fec74b27e19fd2, 6.10.5

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid5: avoid BUG_ON() while continue reshape after reassembling Currently, mdadm support --revert-reshape to abort the reshape while reassembling, as the test 07revert-grow. However, following BUG_ON() can be triggerred by the test: kernel BUG at drivers/md/raid5.c:6278! invalid opcode: 0000 [#1] PREEMPT SMP PTI irq event stamp: 158985 CPU: 6 PID: 891 Comm: md0_reshape Not tainted 6.9.0-03335-g7592a0b0049a #94 RIP: 0010:reshape_request+0x3f1/0xe60 Call Trace: <TASK> raid5_sync_request+0x43d/0x550 md_do_sync+0xb7a/0x2110 md_thread+0x294/0x2b0 kthread+0x147/0x1c0 ret_from_fork+0x59/0x70 ret_from_fork_asm+0x1a/0x30 </TASK> Root cause is that --revert-reshape update the raid_disks from 5 to 4, while reshape position is still set, and after reassembling the array, reshape position will be read from super block, then during reshape the checking of 'writepos' that is caculated by old reshape position will fail. Fix this panic the easy way first, by converting the BUG_ON() to WARN_ON(), and stop the reshape if checkings fail. Noted that mdadm must fix --revert-shape as well, and probably md/raid should enhance metadata validation as well, however this means reassemble will fail and there must be user tools to fix the wrong metadata.

Gravité et risque d'exploitation

CVE-2024-43914 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 12.7 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 5.15.165, 0, <305a5170dc5cf3d395bb4c4e9239bca6d0b54b49, <4811d6e5d9f4090c3e0ff9890eb24077108046ab, 2.6.30, <=5.10.*, <=6.6.*, 5.4.282, <bf0ff69a42a3d2d46876d0514ecf13dffc516666, <=5.4.*, <2.6.30, <=4.19.*, <775a9ba16c9ffe98fe54ebf14e55d5660f2bf600, <c384dd4f1fb3b14a2fd199360701cc163ea88705, 5.10.224, 6.1.105, ec32a2bd35bd6b933a5db6542c48210ce069a376, 6.11, <=*, 4.19.320, <2c92f8c1c456d556f15cbf51667b385026b2e6a0, <=5.15.*, 6.6.46, <3b33740c1750a39e046339ff9240e954f0156707, <=6.10.*, <6b33c468d543f6a83de2d61f09fec74b27e19fd2, 6.10.5) 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