CVE-2026-45916

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: sbs-battery: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle. Keep the old behavior of just printing a warning in case of any failures during the IRQ request and finishing the probe successfully.

Gravité et risque d'exploitation

CVE-2026-45916 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 0.17 %, ce qui la place devant 6.1 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions <=6.1.*, <=6.12.*, d2cec82c28802da31596b395ad292cb8f132fd63, 0, <2078830c32d1e49ac942c6f8c21f35c806ae5e94, 7.0, <14d4dee5d8fb361bfff275832087254beab66d72, 6.1.165, 6.12.75, <8010b745b436c3e1ca5dd960aa29fa3e0f6d8841, <=5.10.*, <=6.6.*, <=6.19.*, <82d3eb97a976c9d56bb92b241397610e57a9c629, <4.9, <=6.18.*, <f1f472b14ad56104ba228b8fbec60d5b21829913, 6.6.128, 5.10.252, <861dda7a9074c0ff67788928165ae39d7f647491, 6.19.4, <=*, 4.9, <=5.15.*, <ca7dd71773e4e050b0fb98768b7eae60f8d1f38b, <8d59cf3887fbabacef53bfba473e33e8a8d9d07b, 5.15.202, 6.18.14) 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/ca7dd71773e4e050b0fb98768b7eae60f8d1f38b
• https://git.kernel.org/stable/c/f1f472b14ad56104ba228b8fbec60d5b21829913
• https://git.kernel.org/stable/c/8010b745b436c3e1ca5dd960aa29fa3e0f6d8841
• https://git.kernel.org/stable/c/2078830c32d1e49ac942c6f8c21f35c806ae5e94
• https://git.kernel.org/stable/c/82d3eb97a976c9d56bb92b241397610e57a9c629
• https://git.kernel.org/stable/c/861dda7a9074c0ff67788928165ae39d7f647491
• https://git.kernel.org/stable/c/14d4dee5d8fb361bfff275832087254beab66d72
• https://git.kernel.org/stable/c/8d59cf3887fbabacef53bfba473e33e8a8d9d07b