CVE-2023-54079

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq27xxx: Fix poll_interval handling and races on remove Before this patch bq27xxx_battery_teardown() was setting poll_interval = 0 to avoid bq27xxx_battery_update() requeuing the delayed_work item. There are 2 problems with this: 1. If the driver is unbound through sysfs, rather then the module being rmmod-ed, this changes poll_interval unexpectedly 2. This is racy, after it being set poll_interval could be changed before bq27xxx_battery_update() checks it through /sys/module/bq27xxx_battery/parameters/poll_interval Fix this by added a removed attribute to struct bq27xxx_device_info and using that instead of setting poll_interval to 0. There also is another poll_interval related race on remove(), writing /sys/module/bq27xxx_battery/parameters/poll_interval will requeue the delayed_work item for all devices on the bq27xxx_battery_devices list and the device being removed was only removed from that list after cancelling the delayed_work item. Fix this by moving the removal from the bq27xxx_battery_devices list to before cancelling the delayed_work item.

Gravité et risque d'exploitation

CVE-2023-54079 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 0.17 %, ce qui la place devant 5.5 % des CVE référencées.

Que faire ?

• Vérifiez si Linux (versions 8cfaaa811894a3ae2d7360a15a6cfccff3ebc7db, <=6.1.*, <4c9615474fb0a41cfad658d78db3c9ec70912969, <e98e5bebfcafc75a7b41192a607dfea5c1268afa, 5.10.181, 4.14.316, 0, <0c5f4cec759679c290720fbcf6bb81768e21c95b, 5.4.244, <=6.3.*, <c00bc80462afc7963f449d7f21d896d2f629cacc, <b12faeca0e819ea09051a705fef9df7ea7e9e18c, 6.4, <3.3, <=5.10.*, <=4.14.*, 6.1.31, <465d919151a1e8d40daf366b868914f59d073211, <d952a1eaafcc5f0351caad5dbe9b5b3300d1d529, <=5.4.*, <e85757da9091998276ff21a13915ac25229cc232, <=4.19.*, 3.3, 4.19.284, <=*, <=5.15.*, 6.3.5, 5.15.114) 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/4c9615474fb0a41cfad658d78db3c9ec70912969
• https://git.kernel.org/stable/c/465d919151a1e8d40daf366b868914f59d073211
• https://git.kernel.org/stable/c/0c5f4cec759679c290720fbcf6bb81768e21c95b
• https://git.kernel.org/stable/c/e85757da9091998276ff21a13915ac25229cc232
• https://git.kernel.org/stable/c/e98e5bebfcafc75a7b41192a607dfea5c1268afa
• https://git.kernel.org/stable/c/d952a1eaafcc5f0351caad5dbe9b5b3300d1d529
• https://git.kernel.org/stable/c/b12faeca0e819ea09051a705fef9df7ea7e9e18c
• https://git.kernel.org/stable/c/c00bc80462afc7963f449d7f21d896d2f629cacc