7.8

CVE-2026-52912

netfilter: nf_queue: hold bridge skb->dev while queued

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_queue: hold bridge skb->dev while queued

br_pass_frame_up() rewrites skb->dev from the ingress port to the bridge
master before queueing bridge LOCAL_IN packets. NFQUEUE only holds
references on state.in/out and bridge physdevs, so a queued bridge
packet can retain a freed bridge master in skb->dev until reinjection.

When the verdict is reinjected later, br_netif_receive_skb() re-enters
the receive path with skb->dev still pointing at the freed bridge master,
triggering a use-after-free.

Store skb->dev in the queue entry, hold a reference on it for the queue
lifetime, and use the saved device when dropping queued packets during
NETDEV_DOWN handling.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.7 < 5.10.259
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.209
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.142
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.92
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.34
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.11
Linux ≫ Linux Kernel Version7.1 Updaterc1
Linux ≫ Linux Kernel Version7.1 Updaterc2
Linux ≫ Linux Kernel Version7.1 Updaterc3
Linux ≫ Linux Kernel Version7.1 Updaterc4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.039
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/950d809f154dca04e5fbe5d3c8b9c5e44769cd57
Patch
https://git.kernel.org/stable/c/a698ac8ab2561cf575d2d9f34095032651dd952e
Patch
https://git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75ac
Patch
https://git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be
Patch
https://git.kernel.org/stable/c/3823c27099cfe2482299065814adbaa771be9644
Patch
https://git.kernel.org/stable/c/15d464265120ab9818bd673af301deee09bedab2
Patch
https://git.kernel.org/stable/c/3fb0f5c0f64162a8c3f25616a4f1e340b921737f
Patch
https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce
Patch