Описание
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: fix stale receive device on merged fragments
Fragment reassembly reuses the skb from the highest-numbered buffered fragment as the merged packet. When that fragment was received on a hard interface which is deleted before the chain completes, the merged skb can re-enter the receive path with a stale skb->dev and skb_iif.
batadv_batman_skb_recv() passes such merged packets through the normal receive handlers again. DAT and bridge loop avoidance both derive the ARP header length from skb->dev, so they can dereference the freed net_device before the packet reaches the local mesh interface.
Refresh the receive device metadata from the current receive device before running the packet handlers. This keeps internally reinjected merged fragments consistent with the normal receive path after hard interface teardown.
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: fix stale receive device on merged fragments
Fragment reassembly reuses the skb from the highest-numbered buffered fragment as the merged packet. When that fragment was received on a hard interface which is deleted before the chain completes, the merged skb can re-enter the receive path with a stale skb->dev and skb_iif.
batadv_batman_skb_recv() passes such merged packets through the normal receive handlers again. DAT and bridge loop avoidance both derive the ARP header length from skb->dev, so they can dereference the freed net_device before the packet reaches the local mesh interface.
Refresh the receive device metadata from the current receive device before running the packet handlers. This keeps internally reinjected merged fragments consistent with the normal receive path after hard interface teardown.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2026-89951
- https://git.kernel.org/stable/c/2dffc8c44b6e3347b3719c6419c07b4a18fea895
- https://git.kernel.org/stable/c/63d86250fa7cbe22451369bd1c0881dfc8190958
- https://git.kernel.org/stable/c/6df64825f8b199921120c685af2abca14b077331
- https://git.kernel.org/stable/c/a2c272da99c2077088083c14961cf2f1e4506995
- https://git.kernel.org/stable/c/ad46c907d7d9975a285c1e89a4adde652eaa93f5
- https://git.kernel.org/stable/c/e91d2cc7441d89a45bad73ad9789159c7441cb80
- https://git.kernel.org/stable/c/f4b4ae763b5d59319fad62a00c76676758e7dafa
- https://git.kernel.org/stable/c/f830c2dfc1431764db9256b3d5db1695fc9a7f56
Связанные уязвимости
(In the Linux kernel, the following vulnerability has been resolved: b ...)
In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix stale receive device on merged fragments Fragment reassembly reuses the skb from the highest-numbered buffered fragment as the merged packet. When that fragment was received on a hard interface which is deleted before the chain completes, the merged skb can re-enter the receive path with a stale skb->dev and skb_iif. batadv_batman_skb_recv() passes such merged packets through the normal receive handlers again. DAT and bridge loop avoidance both derive the ARP header length from skb->dev, so they can dereference the freed net_device before the packet reaches the local mesh interface. Refresh the receive device metadata from the current receive device before running the packet handlers. This keeps internally reinjected merged fragments consistent with the normal receive path after hard interface teardown.
In the Linux kernel, the following vulnerability has been resolved: b ...