NULL Pointer Dereference Affecting kernel-docs package, versions <6.4.0-150600.23.42.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.2% (11th percentile)

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  • Snyk IDSNYK-SLES156-KERNELDOCS-9406116
  • published14 Mar 2025
  • disclosed13 Mar 2025

Introduced: 13 Mar 2025

CVE-2025-21689  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-docs to version 6.4.0-150600.23.42.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-docs package and not the kernel-docs package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

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

USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb()

This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following:

   if (newport &gt; serial-&gt;num_ports) {
           dev_err(&amp;port-&gt;dev,
                   &#34;%s - port change to invalid port: %i\n&#34;,
                   __func__, newport);
           break;
   }

The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL:

   serial_priv-&gt;current_port = newport;
   port = serial-&gt;port[serial_priv-&gt;current_port];

The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.

CVSS Base Scores

version 3.1