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CVE-2026-74519

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.1%
Linux•Linux•Versions : <=6.1.*, <1586423da2739a80871ef6240016fcb9c7339bfb, 4.9.244, <=6.12.*, 7.2, 0, 4.14.161, <=7.1.*, <4.10, 4.19.92, 5.15.216, 6.12.103, <321fe3584a8298386938130d138191aa35040b75, <ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8, <4.20, 5.4.7, <=5.10.*, <=6.6.*, <929f6396baade89999ec8a1281232c101cbc727d, <4.5, 6.1.183, <5.5, <=6.18.*, be4c60b563edee3712d392aaeb0943a768df7023, 4.4.244, 5.5, <9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d, <e3cfb22bad363bebcfd55d909e12d499cb8c5490, <=*, <=5.15.*, 7.1.8, f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d, 77440c3a37203e3f4667d06e37f76ef3968d2d8c, 6.18.44, f88ac1330779c5bfdd79f7d7f7d4d3343c782f92, <4.15, 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3, <dec5f0a8080502908dec5e35597c7ae07d533a3b, <015b5bcbcb622b32317642be91a7f79aa5413649, 03f69244302d7954f42f528ea2d45903ebbf59f3, 5.10.265, 6.6.151

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: don't free uninitialized dev_name on error path dt_remember_or_free_map() duplicates dev_name for each map entry. If kstrdup_const() fails, dt_free_map() frees dev_name in all num_maps entries, including entries that have not been initialized. Some pinctrl drivers, including pinctrl-imx, allocate the map with kmalloc() and leave dev_name for the core to initialize. The untouched entries therefore contain uninitialized data which is passed to kfree_const(). Reproduced on qemu's mcimx6ul-evk (pinctrl-imx) with failslab injection while binding the pinctrl-consuming device, under KASAN: BUG: KASAN: double-free in dt_free_map+0x34/0xa4 Free of addr c425a900 by task init/1 kfree from dt_free_map+0x34/0xa4 dt_free_map from dt_remember_or_free_map+0x184/0x198 dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8 pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0 Initialize all dev_name fields to NULL before duplicating the device name, making the full-map cleanup safe after a partial failure.

Gravité et risque d'exploitation

CVE-2026-74519 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 0.15 %, ce qui la place devant 3.4 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, <1586423da2739a80871ef6240016fcb9c7339bfb, 4.9.244, <=6.12.*, 7.2, 0, 4.14.161, <=7.1.*, <4.10, 4.19.92, 5.15.216, 6.12.103, <321fe3584a8298386938130d138191aa35040b75, <ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8, <4.20, 5.4.7, <=5.10.*, <=6.6.*, <929f6396baade89999ec8a1281232c101cbc727d, <4.5, 6.1.183, <5.5, <=6.18.*, be4c60b563edee3712d392aaeb0943a768df7023, 4.4.244, 5.5, <9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d, <e3cfb22bad363bebcfd55d909e12d499cb8c5490, <=*, <=5.15.*, 7.1.8, f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d, 77440c3a37203e3f4667d06e37f76ef3968d2d8c, 6.18.44, f88ac1330779c5bfdd79f7d7f7d4d3343c782f92, <4.15, 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3, <dec5f0a8080502908dec5e35597c7ae07d533a3b, <015b5bcbcb622b32317642be91a7f79aa5413649, 03f69244302d7954f42f528ea2d45903ebbf59f3, 5.10.265, 6.6.151) 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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