In the Linux kernel, the following vulnerability has been resolved:
netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path
nfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue
entry from the queue data structures, taking ownership of the entry.
For PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN
attributes. If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN
present but NFQA_VLAN_TCI missing), the function returns immediately
without freeing the dequeued entry or its sk_buff.
This leaks the nf_queue_entry, its associated sk_buff, and all held
references (net_device refcounts, struct net refcount). Repeated
triggering exhausts kernel memory.
Fix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict
on the error path, consistent with other error handling in this file.
References
Configurations
Configuration 1 (hide)
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History
21 May 2026, 16:55
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
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| References | () https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b - Patch | |
| References | () https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275 - Patch | |
| References | () https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982 - Patch | |
| References | () https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41 - Patch | |
| References | () https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794 - Patch | |
| References | () https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b - Patch | |
| References | () https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f - Patch | |
| References | () https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-401 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-21 16:55
NVD link : CVE-2026-43451
Mitre link : CVE-2026-43451
CVE.ORG link : CVE-2026-43451
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime