CVE-2025-39962

HighCVSS 7.8/10Last modified Oct 19, 2026

Description

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

rxrpc: Fix untrusted unsigned subtract

Fix the following Smatch static checker warning:

net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket() warn: untrusted unsigned subtract. 'ticket_len - 10 * 4'

by prechecking the length of what we're trying to extract in two places in the token and decoding for a response packet.

Also use sizeof() on the struct we're extracting rather specifying the size numerically to be consistent with the other related statements.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

No affected versions have been published.

Timeline

Published
Oct 9, 2025
Last modified
Oct 19, 2026
NVD status
Modified

Related CVEs from 2025

CVE-2025-399637.8In the Linux kernel, the following vulnerability has been resolved: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_sCVE-2025-399645.5In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg Issuing CVE-2025-399655.5In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_alloc_spi shouldn't use 0 as SPI x->id.spi == 0 means "no SCVE-2025-399667.0In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix race during abort for file descriptors fput() doesn't actCVE-2025-399677.8In the Linux kernel, the following vulnerability has been resolved: fbcon: fix integer overflow in fbcon_do_set_font Fix integer overflow CVE-2025-399687.3In the Linux kernel, the following vulnerability has been resolved: i40e: add max boundary check for VF filters There is no check for max CVE-2025-399698.8In the Linux kernel, the following vulnerability has been resolved: i40e: fix validation of VF state in get resources VF state I40E_VF_STACVE-2025-39974.3A vulnerability classified as problematic has been found in dazhouda lecms 3.0.3. This affects an unknown part of the file /index.php?my-proCVE-2025-399708.8In the Linux kernel, the following vulnerability has been resolved: i40e: fix input validation logic for action_meta Fix condition to checCVE-2025-399718.8In the Linux kernel, the following vulnerability has been resolved: i40e: fix idx validation in config queues msg Ensure idx is within ranCVE-2025-399728.8In the Linux kernel, the following vulnerability has been resolved: i40e: fix idx validation in i40e_validate_queue_map Ensure idx is withCVE-2025-399738.8In the Linux kernel, the following vulnerability has been resolved: i40e: add validation for ring_len param The `ring_len` parameter provi
CVE-2025-39962: High severity, CVSS 7.8 | Vulnix