CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's netfilter component, specifically the CONNMARK target, which improperly accepts user-controlled shift parameters that can lead to undefined behavior when evaluating certain rules. This flaw could allow an attacker to exploit malformed rules, potentially leading to system instability or security bypasses. Organizations using Linux kernel versions with this vulnerability should prioritize patching to mitigate risks associated with malformed network rules.
Original NVD Description
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.