CVE-2025-37989

Description

In the Linux kernel, the following vulnerability has been resolved: net: phy: leds: fix memory leak A network restart test on a router led to an out-of-memory condition, which was traced to a memory leak in the PHY LED trigger code. The root cause is misuse of the devm API. The registration function (phy_led_triggers_register) is called from phy_attach_direct, not phy_probe, and the unregister function (phy_led_triggers_unregister) is called from phy_detach, not phy_remove. This means the register and unregister functions can be called multiple times for the same PHY device, but devm-allocated memory is not freed until the driver is unbound. This also prevents kmemleak from detecting the leak, as the devm API internally stores the allocated pointer. Fix this by replacing devm_kzalloc/devm_kcalloc with standard kzalloc/kcalloc, and add the corresponding kfree calls in the unregister path.

Gravité et risque d'exploitation

CVE-2025-37989 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 0.20 %, ce qui la place devant 9.0 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <=6.14.*, <966d6494e2ed9be9052fcd9815afba830896aaf8, <618541a6cc1511064dfa58c89b3445e21844092f, 6.14.5, 0, 6.12.26, 5.10.237, <4.10, 6.1.136, <=5.10.*, <=6.6.*, <7f3d5880800f962c347777c4f8358f29f5fc403c, 4.10, <41143e71052a00d654c15dc924fda50c1e7357d0, <=5.4.*, 6.6.89, 2e0bc452f4721520502575362a9cd3c1248d2337, <663c3da86e807c6c07ed48f911c7526fad6fe1ff, 6.15, <=*, <=5.15.*, <95bed65cc0eb2a610550abf849a8b94374da80a7, 5.15.181, 5.4.293, <b7f0ee992adf601aa00c252418266177eb7ac2bc, <f41f097f68a33d392579885426d0734a81219501) 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

• https://git.kernel.org/stable/c/966d6494e2ed9be9052fcd9815afba830896aaf8
• https://git.kernel.org/stable/c/95bed65cc0eb2a610550abf849a8b94374da80a7
• https://git.kernel.org/stable/c/663c3da86e807c6c07ed48f911c7526fad6fe1ff
• https://git.kernel.org/stable/c/f41f097f68a33d392579885426d0734a81219501
• https://git.kernel.org/stable/c/618541a6cc1511064dfa58c89b3445e21844092f
• https://git.kernel.org/stable/c/41143e71052a00d654c15dc924fda50c1e7357d0
• https://git.kernel.org/stable/c/7f3d5880800f962c347777c4f8358f29f5fc403c
• https://git.kernel.org/stable/c/b7f0ee992adf601aa00c252418266177eb7ac2bc