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 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.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://git.kernel.org/stable/c/c3fa852d117b3fda72265e4230e3967db4a74fcf
https://git.kernel.org/stable/c/d8ce63d928b457fba7ed1e302492dfd32293671c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72347

Mitre link : CVE-2026-72347

CVE.ORG link : CVE-2026-72347

JSON object : View

Products Affected

No product.

CWE

No CWE.

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