CVE-2025-40301 Affecting kernel-rt-debug-devel package, versions <0:6.12.0-124.31.1.el10_1


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-ROCKY10-KERNELRTDEBUGDEVEL-15250272
  • published9 Feb 2026
  • disclosed8 Dec 2025

Introduced: 8 Dec 2025

CVE-2025-40301  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 kernel-rt-debug-devel to version 0:6.12.0-124.31.1.el10_1 or higher.
This issue was patched in RLSA-2026:1690.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-devel package and not the kernel-rt-debug-devel package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: validate skb length for unknown CC opcode

In hci_cmd_complete_evt(), if the command complete event has an unknown opcode, we assume the first byte of the remaining skb->data contains the return status. However, parameter data has previously been pulled in hci_event_func(), which may leave the skb empty. If so, using skb->data[0] for the return status uses un-init memory.

The fix is to check skb->len before using skb->data.

CVSS Base Scores

version 3.1