PT-2025-36268 · Linux+6 · Linux Kernel+6
Published
2025-01-01
·
Updated
2026-04-20
·
CVE-2025-39673
CVSS v3.1
4.7
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The
ppp fill forward path() function contained race conditions. Specifically, the ppp->channels list could change between checks for emptiness and accessing its first entry, potentially leading to a panic if a channel was deleted during this process. Additionally, pch->chan could become NULL before being dereferenced. These issues were addressed by implementing a lockless RCU approach, utilizing list first or null rcu() for safe list access, converting list modifications to their RCU variants, and adding synchronization after removal, as well as checking for a NULL pch->chan before dereferencing it.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu