CVE-2026-97436
Vulnérabilité non évaluée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: rework FDB management on the bridge leave path On bridge leave, the dpaa2_switch_port_set_fdb() function always allocates a new FDB for the port which is becoming standalone. In case no FDB is found, then the port leaving a bridge will continue to use the current one. The above logic does not cover the case in which there are multiple bridges which have ports from the same DPSW instance. In this case, when the last port leaves bridge #1, it finds an unused FDB to switch to, but the old FDB is not marked as unused. Since the number of FDBs is equal to the number of DPSW interfaces, this will eventually lead to multiple ports sharing the same FDB. Fix this by changing how we are managing the FDBs on the leave path. Instead of directly allocating a new FDB, first verify if the current port is the last one to leave a bridge. If this is the case, then continue to use the current FDB and only allocate another FDB if there are other ports remaining in the bridge.
Gravité et risque d'exploitation
CVE-2026-97436 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 6.2 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <5.13, 6.18.53, 0, <ec41bfd281a8bc8027a42d2674eac5b74947ff7a, <dc626f2abb3052881911b6166a9425739ce80085, 6.6.158, <=6.6.*, 6.1.189, <abea361a11e4e48695ea149652ef5d3f308b6a49, 5.13, <=6.18.*, 5.15.222, <5adbc4d02d7df8bd7aa02c21874f7a582a576b55, <e07ff2338f45adbf572850335d761c2f97545935, 539dda3c5d190c5088b5e57944b1b482fcb464de, <efc1d92eacf03afa6f4d53bf7120e059b6f961f2, <=*, <=5.15.*, 7.2, 6.12.111) 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/ec41bfd281a8bc8027a42d2674eac5b74947ff7a
- https://git.kernel.org/stable/c/e07ff2338f45adbf572850335d761c2f97545935
- https://git.kernel.org/stable/c/dc626f2abb3052881911b6166a9425739ce80085
- https://git.kernel.org/stable/c/abea361a11e4e48695ea149652ef5d3f308b6a49
- https://git.kernel.org/stable/c/5adbc4d02d7df8bd7aa02c21874f7a582a576b55
- https://git.kernel.org/stable/c/efc1d92eacf03afa6f4d53bf7120e059b6f961f2