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CVE-2024-43846

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.2%
Linux•Linux•Versions : 6.10.3, <=6.1.*, 6.1.103, 5.15.165, 0, <499f742fed42e74f1321f4b12ca196a66a2b49fc, <5adc61d29bbb461d7f7c2b48dceaa90ecd182eb7, <22ae17a267f4812861f0c644186c3421ff97dbfc, <=5.10.*, <=6.6.*, <565213e005557eb6cc4e42189d26eb300e02f170, <b4a3a89fffcdf09702b1f161b914e52abca1894d, 5.4.282, <5.1, <=5.4.*, 9069a3817d82b01b3a55da382c774e3575946130, 5.1, 5.10.224, 6.11, <=*, <1936fa05a180834c3b52e0439a6bddc07814d3eb, <=5.15.*, 6.6.44, <8161263362154cbebfbf4808097b956a6a8cb98a, <=6.10.*

Description

In the Linux kernel, the following vulnerability has been resolved: lib: objagg: Fix general protection fault The library supports aggregation of objects into other objects only if the parent object does not have a parent itself. That is, nesting is not supported. Aggregation happens in two cases: Without and with hints, where hints are a pre-computed recommendation on how to aggregate the provided objects. Nesting is not possible in the first case due to a check that prevents it, but in the second case there is no check because the assumption is that nesting cannot happen when creating objects based on hints. The violation of this assumption leads to various warnings and eventually to a general protection fault [1]. Before fixing the root cause, error out when nesting happens and warn. [1] general protection fault, probably for non-canonical address 0xdead000000000d90: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 1083 Comm: kworker/1:9 Tainted: G W 6.9.0-rc6-custom-gd9b4f1cca7fb #7 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:mlxsw_sp_acl_erp_bf_insert+0x25/0x80 [...] Call Trace: <TASK> mlxsw_sp_acl_atcam_entry_add+0x256/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_one+0x16b/0x270 mlxsw_sp_acl_tcam_vregion_rehash_work+0xbe/0x510 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 ret_from_fork_asm+0x1a/0x30 </TASK>

Gravité et risque d'exploitation

CVE-2024-43846 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.23 %, ce qui la place devant 12.9 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.10.3, <=6.1.*, 6.1.103, 5.15.165, 0, <499f742fed42e74f1321f4b12ca196a66a2b49fc, <5adc61d29bbb461d7f7c2b48dceaa90ecd182eb7, <22ae17a267f4812861f0c644186c3421ff97dbfc, <=5.10.*, <=6.6.*, <565213e005557eb6cc4e42189d26eb300e02f170, <b4a3a89fffcdf09702b1f161b914e52abca1894d, 5.4.282, <5.1, <=5.4.*, 9069a3817d82b01b3a55da382c774e3575946130, 5.1, 5.10.224, 6.11, <=*, <1936fa05a180834c3b52e0439a6bddc07814d3eb, <=5.15.*, 6.6.44, <8161263362154cbebfbf4808097b956a6a8cb98a, <=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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