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CVE-2024-47699

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.3%
Linux•Linux•Versions : 6.12, <=6.1.*, <=6.11.*, 6.10.13, <1d94dbdfbb64cc48d10dec65cc3c4fbf2497b343, 5.4.285, 0, <2b78e9df10fb7f4e9d3d7a18417dd72fbbc1dfd0, 17c76b0104e4a6513983777e1a17e0297a12b0c4, <24bf40740a3da6b4056721da34997ae6938f3da1, <db73500d3f0e558eb642aae1d4782e7726b4a03f, <3644554d308ddf2669e459a1551a7edf60b2d62b, <=5.10.*, 2.6.30, <=6.6.*, <f68523e0f26faade18833fbef577a4295d8e2c94, <73d23ecf234b7a6d47fb883f2dabe10e3230b31d, <9403001ad65ae4f4c5de368bdda3a0636b51d51a, <=5.4.*, <21839b6fbc3c41b3e374ecbdb0cabbbb2c53cf34, 6.6.54, <2.6.30, <=4.19.*, 6.1.113, 4.19.323, <=*, <=5.15.*, 5.10.227, 5.15.168, 6.11.2, <=6.10.*

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential null-ptr-deref in nilfs_btree_insert() Patch series "nilfs2: fix potential issues with empty b-tree nodes". This series addresses three potential issues with empty b-tree nodes that can occur with corrupted filesystem images, including one recently discovered by syzbot. This patch (of 3): If a b-tree is broken on the device, and the b-tree height is greater than 2 (the level of the root node is greater than 1) even if the number of child nodes of the b-tree root is 0, a NULL pointer dereference occurs in nilfs_btree_prepare_insert(), which is called from nilfs_btree_insert(). This is because, when the number of child nodes of the b-tree root is 0, nilfs_btree_do_lookup() does not set the block buffer head in any of path[x].bp_bh, leaving it as the initial value of NULL, but if the level of the b-tree root node is greater than 1, nilfs_btree_get_nonroot_node(), which accesses the buffer memory of path[x].bp_bh, is called. Fix this issue by adding a check to nilfs_btree_root_broken(), which performs sanity checks when reading the root node from the device, to detect this inconsistency. Thanks to Lizhi Xu for trying to solve the bug and clarifying the cause early on.

Gravité et risque d'exploitation

CVE-2024-47699 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 0.26 %, ce qui la place devant 16.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.12, <=6.1.*, <=6.11.*, 6.10.13, <1d94dbdfbb64cc48d10dec65cc3c4fbf2497b343, 5.4.285, 0, <2b78e9df10fb7f4e9d3d7a18417dd72fbbc1dfd0, 17c76b0104e4a6513983777e1a17e0297a12b0c4, <24bf40740a3da6b4056721da34997ae6938f3da1, <db73500d3f0e558eb642aae1d4782e7726b4a03f, <3644554d308ddf2669e459a1551a7edf60b2d62b, <=5.10.*, 2.6.30, <=6.6.*, <f68523e0f26faade18833fbef577a4295d8e2c94, <73d23ecf234b7a6d47fb883f2dabe10e3230b31d, <9403001ad65ae4f4c5de368bdda3a0636b51d51a, <=5.4.*, <21839b6fbc3c41b3e374ecbdb0cabbbb2c53cf34, 6.6.54, <2.6.30, <=4.19.*, 6.1.113, 4.19.323, <=*, <=5.15.*, 5.10.227, 5.15.168, 6.11.2, <=6.10.*) 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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