UNKNOWN NVD
CVE-2026-72347
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_connmark: reject invalid shift parameters Revision 2 of the CONNMARK target
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xt_connmark: reject invalid shift parameters
Revision 2 of the CONNMARK target accepts user-controlled shift
parameters and applies them to 32-bit mark values in
connmark_tg_shift().
A shift_bits value of 32 or more triggers an undefined-shift bug when
the rule is evaluated. Invalid shift_dir values are also accepted and
silently fall back to the left-shift path.
Reject invalid revision-2 shift parameters in connmark_tg_check() so
malformed rules fail at installation time, before they can reach the
packet path.
References
- https://git.kernel.org/stable/c/1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc
- https://git.kernel.org/stable/c/230173cc6105bdfb2696d37e6e56687b003fbe63
- https://git.kernel.org/stable/c/4eef84b09a3836919360c4232b0f16651a155eec
- https://git.kernel.org/stable/c/8ace320ac4416f5e5fbcd065309fb2dfcce787b0
- https://git.kernel.org/stable/c/9657bb11a6376ab0a79f05d433713d6944111e9d
This unknown severity vulnerability was published on 2026-08-15 via NVD.
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