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CVE-2022-50261

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <=6.1.*, <0ad811cc08a937d875cbad0149c1bab17f84ba05, <8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba, <a075c21ee026f4a74f9fce5928ea3c8d18a8af13, <6e3c4d3fa5d458d685561ecbaf8daa9dba14979e, 0, 4.14.303, <e578b0906b6a81479cd5b5b6c848a7096addf5e9, <b4307c7d35e346b909edfdc1f280902150570bb6, <=4.9.*, 4.19.270, <511b48ee8e4aec2d03d2af06b363d9eb3230b017, <=5.10.*, <=4.14.*, <=6.0.*, 5.4.229, 6.0.16, <=5.4.*, 5402626c83a2f19da14859e2bab231a53e16ee74, <=4.19.*, <04371a75a58422a301a9ff9ae3babd310ac3bb3f, 4.9.337, <b2c92b2a3801b09b709cbefd9a9e4944b72400bf, 5.10.163, <=*, <=5.15.*, 6.1.2, <3.17, 3.17, 6.2, 5.15.86

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid() 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/gpu/drm/sti/sti_hda.c:637:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_hda_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/sti/sti_dvo.c:376:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_dvo_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/sti/sti_hdmi.c:1035:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_hdmi_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ->mode_valid() in 'struct drm_connector_helper_funcs' expects a return type of 'enum drm_mode_status', not 'int'. Adjust the return type of sti_{dvo,hda,hdmi}_connector_mode_valid() to match the prototype's to resolve the warning and CFI failure.

Gravité et risque d'exploitation

CVE-2022-50261 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 5.2 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <0ad811cc08a937d875cbad0149c1bab17f84ba05, <8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba, <a075c21ee026f4a74f9fce5928ea3c8d18a8af13, <6e3c4d3fa5d458d685561ecbaf8daa9dba14979e, 0, 4.14.303, <e578b0906b6a81479cd5b5b6c848a7096addf5e9, <b4307c7d35e346b909edfdc1f280902150570bb6, <=4.9.*, 4.19.270, <511b48ee8e4aec2d03d2af06b363d9eb3230b017, <=5.10.*, <=4.14.*, <=6.0.*, 5.4.229, 6.0.16, <=5.4.*, 5402626c83a2f19da14859e2bab231a53e16ee74, <=4.19.*, <04371a75a58422a301a9ff9ae3babd310ac3bb3f, 4.9.337, <b2c92b2a3801b09b709cbefd9a9e4944b72400bf, 5.10.163, <=*, <=5.15.*, 6.1.2, <3.17, 3.17, 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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