Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-39962

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
09/10/2025
Last modified:
03/02/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rxrpc: Fix untrusted unsigned subtract<br /> <br /> Fix the following Smatch static checker warning:<br /> <br /> net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket()<br /> warn: untrusted unsigned subtract. &amp;#39;ticket_len - 10 * 4&amp;#39;<br /> <br /> by prechecking the length of what we&amp;#39;re trying to extract in two places in<br /> the token and decoding for a response packet.<br /> <br /> Also use sizeof() on the struct we&amp;#39;re extracting rather specifying the size<br /> numerically to be consistent with the other related statements.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.16 (including) 6.16.9 (excluding)
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools