CVE-2025-39713 Affecting kernel-uek-debug package, versions <0:5.15.0-314.193.5.3.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.12% (32nd percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEKDEBUG-13870781
  • published10 Nov 2025
  • disclosed5 Sept 2025

Introduced: 5 Sep 2025

CVE-2025-39713  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek-debug to version 0:5.15.0-314.193.5.3.el9uek or higher.
This issue was patched in ELSA-2025-25757.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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

media: rainshadow-cec: fix TOCTOU race condition in rain_interrupt()

In the interrupt handler rain_interrupt(), the buffer full check on rain->buf_len is performed before acquiring rain->buf_lock. This creates a Time-of-Check to Time-of-Use (TOCTOU) race condition, as rain->buf_len is concurrently accessed and modified in the work handler rain_irq_work_handler() under the same lock.

Multiple interrupt invocations can race, with each reading buf_len before it becomes full and then proceeding. This can lead to both interrupts attempting to write to the buffer, incrementing buf_len beyond its capacity (DATA_SIZE) and causing a buffer overflow.

Fix this bug by moving the spin_lock() to before the buffer full check. This ensures that the check and the subsequent buffer modification are performed atomically, preventing the race condition. An corresponding spin_unlock() is added to the overflow path to correctly release the lock.

This possible bug was found by an experimental static analysis tool developed by our team.

CVSS Base Scores

version 3.1