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CVE-2022-50564

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <2.6.32, <4bee3c75d5bf7c2b5dc0b520410eb40449e5da31, <85d392710275355425df8618ccbebbc336f5acc5, <3ac0217ca9186c2f9af9a0113a331a42aa847894, 0, dc1f8bf68b311b1537cb65893430b6796118498a, 4.14.303, <=4.9.*, 4.19.270, <=5.10.*, <=4.14.*, <=6.0.*, 5.4.229, 6.0.16, <=5.4.*, <=4.19.*, 2.6.32, 4.9.337, <e7a849f740e3576e79cba403697e916f4c3a6f12, <dfbf0122ea1b9b3e73fa22c8ff6bd888935c54fc, 5.10.163, <=*, <=5.15.*, 6.1.2, <eccc88c0efe407e579291792ad07a7dedc0f63f0, <d034fa43af92fc46a81d882f46d9cc3e4ffdbbcc, <88d86d18d7cf7e9137c95f9d212bb9fff8a1b4be, <f13d870fce90f01cf930bfaffecc8185ae0be21c, 6.2, 5.15.86

Description

In the Linux kernel, the following vulnerability has been resolved: s390/netiucv: Fix return type of netiucv_tx() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/s390/net/netiucv.c:1854:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict] .ndo_start_xmit = netiucv_tx, ^~~~~~~~~~ ->ndo_start_xmit() in 'struct net_device_ops' expects a return type of 'netdev_tx_t', not 'int'. Adjust the return type of netiucv_tx() to match the prototype's to resolve the warning and potential CFI failure, should s390 select ARCH_SUPPORTS_CFI_CLANG in the future. Additionally, while in the area, remove a comment block that is no longer relevant.

Gravité et risque d'exploitation

CVE-2022-50564 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 0.25 %, ce qui la place devant 15.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <2.6.32, <4bee3c75d5bf7c2b5dc0b520410eb40449e5da31, <85d392710275355425df8618ccbebbc336f5acc5, <3ac0217ca9186c2f9af9a0113a331a42aa847894, 0, dc1f8bf68b311b1537cb65893430b6796118498a, 4.14.303, <=4.9.*, 4.19.270, <=5.10.*, <=4.14.*, <=6.0.*, 5.4.229, 6.0.16, <=5.4.*, <=4.19.*, 2.6.32, 4.9.337, <e7a849f740e3576e79cba403697e916f4c3a6f12, <dfbf0122ea1b9b3e73fa22c8ff6bd888935c54fc, 5.10.163, <=*, <=5.15.*, 6.1.2, <eccc88c0efe407e579291792ad07a7dedc0f63f0, <d034fa43af92fc46a81d882f46d9cc3e4ffdbbcc, <88d86d18d7cf7e9137c95f9d212bb9fff8a1b4be, <f13d870fce90f01cf930bfaffecc8185ae0be21c, 6.2, 5.15.86) 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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