CVE-2026-72350

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_u32: reject invalid shift counts u32_match_it() executes rule-supplied shift operands on a 32-bit value. A malformed u32 rule can provide a shift count of 32 or more, triggering an undefined shift out-of-bounds during packet evaluation. Validate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in u32_mt_checkentry() and reject malformed rules before they reach the packet path.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/00d034fe8230dfc5832fe011ff2d81c1a2cc7a29
https://git.kernel.org/stable/c/0a8b7a6d763775709c601f584e709ae48bcc000a
https://git.kernel.org/stable/c/64cdf7d30ac18e43df6c48004435febb965809a8
https://git.kernel.org/stable/c/728f479dc0447ae7eaef87926ff49142e415a811
https://git.kernel.org/stable/c/a597a722fb71a534138c20359b655726622b5f17
https://git.kernel.org/stable/c/b33b44250d57ab0e5a1e2571b5285fb0d0a7f382
https://git.kernel.org/stable/c/ca7c92d9701249e6daf132087756a88cbf2bb2a3
https://git.kernel.org/stable/c/cce42014415cecd98aa49b3950e7b02ee7c81268

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72350

Mitre link : CVE-2026-72350

CVE.ORG link : CVE-2026-72350

JSON object : View

Products Affected

No product.

CWE

No CWE.

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A malformed u32 rule can provide a shift count of 32 or more,\ntriggering an undefined shift out-of-bounds during packet evaluation.\n\nValidate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in\nu32_mt_checkentry() and reject malformed rules before they reach the\npacket path."}], "lastModified": "2026-08-17T06:18:39.020", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}