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CVE-2026-63831

kernel: mac802154: llsec: add skb_cow_data() before in-place crypto

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Severity

Important

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 31, 2026

Description

A flaw was found in the Linux kernel's mac802154 (IEEE 802.15.4 MAC security) component. This vulnerability allows for data corruption and potential kernel crashes when cryptographic transformations are performed on shared network packet data without proper isolation. A remote attacker could exploit this by sending specific 802.15.4 traffic, leading to system instability or denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-820 · Missing Synchronization