PT-2025-37483 · Linux+1 · Linux Kernel+1

Published 2025-09-15 · Updated 2025-11-24 · CVE-2025-39802

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's crypto/arm/poly1305 module where register corruption can occur in non-SIMD contexts. This issue arises from the removal of a SIMD usability check, potentially leading to incorrect MAC computations and corruption of registers in other tasks if Poly1305 functions are called when SIMD registers are unavailable. The fix involves restoring the SIMD usability check using may use simd().

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

Exploit

Related Identifiers

CVE-2025-39802

Affected Products

Astra Linux

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39802.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-39802 · Vendor Advisory
• https://git.kernel.org/stable/c/52c3e242f4d0043186b70d65460ba1767f27494a · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-39802 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-39802 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-39802 · Security Note
• https://git.kernel.org/stable/c/87bdfba903be7084cb3ee04032b14a81181fe413 · Patch
• https://ubuntu.com/security/CVE-2025-39802 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-39802 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39802 · Security Note
• https://twitter.com/CVEnew/status/1967575626681815267 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://t.me/cveNotify/135465 · Telegram Post
• https://t.me/cveNotify/143847 · Telegram Post
• https://git.kernel.org/linus/52c3e242f4d0043186b70d65460ba1767f27494a · Note