In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: strictly check for maximum number of actions
The maximum number of flowtable hardware offload actions in IPv6 is:
* ethernet mangling (4 payload actions, 2 for each ethernet address)
* SNAT (4 payload actions)
* DNAT (4 payload actions)
* Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing)
for QinQ.
* Redirect (1 action)
Which makes 17, while the maximum is 16. But act_ct supports for tunnels
actions too. Note that payload action operates at 32-bit word level, so
mangling an IPv6 address takes 4 payload actions.
Update flow_action_entry_next() calls to check for the maximum number of
supported actions.
While at it, rise the maximum number of actions per flow from 16 to 24
so this works fine with IPv6 setups.
References
Configurations
Configuration 1 (hide)
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History
18 May 2026, 12:41
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo | |
| References | () https://git.kernel.org/stable/c/504c9456699dcf4d15195ef34a0fa94a80bfc877 - Patch | |
| References | () https://git.kernel.org/stable/c/5382bb03e9c33b089d60788478b922a2dca284cc - Patch | |
| References | () https://git.kernel.org/stable/c/57c78bd2e2dd08897acd35b2bf8bcef322e36f5e - Patch | |
| References | () https://git.kernel.org/stable/c/76522fcdbc3a02b568f5d957f7e66fc194abb893 - Patch | |
| References | () https://git.kernel.org/stable/c/879959a7a2be814dd57568655eafa3d8f4d0309e - Patch | |
| References | () https://git.kernel.org/stable/c/ead66c77303f760f6c30be96e2e20d5a77cef614 - Patch | |
| References | () https://git.kernel.org/stable/c/fe9018d3e94329f1951b00805a8640bc06f56ead - Patch |
11 May 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
08 May 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 14:16
Updated : 2026-05-18 12:41
NVD link : CVE-2026-43329
Mitre link : CVE-2026-43329
CVE.ORG link : CVE-2026-43329
JSON object : View
Products Affected
linux
- linux_kernel
CWE