PT-2025-4360 · Linux+1 · Linux Kernel+1

Boris Burkov · Published 2025-01-08 · Updated 2025-02-04 · CVE-2025-21679

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/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 issue is related to the function get canonical dev path() in the Linux kernel's btrfs module. It involves a buffer overflow vulnerability that can be triggered when the d path() function returns an error, leading to an invalid memory access during the subsequent strscpy() call. This vulnerability can potentially allow an attacker to cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

BDU:2025-01485

CVE-2025-21679

Affected Products

Astra Linux

Linux Kernel

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21679.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-21679 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-01485 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2025-21679 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-21679 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21679 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21679 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://git.kernel.org/stable/c/fe4de594f7a2e9bc49407de60fbd20809fad4192 · Patch
• https://cve.org/CVERecord?id=CVE-2025-21679 · Security Note
• https://git.kernel.org/stable/c/d0fb5741932b831eded49bfaaf33353e96200d6d · Patch
• https://linux.oracle.com/errata/ELSA-2025-20480.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21679 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21679 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2025-21679 · Note