PT-2025-14485 · Linux+1 · Linux Kernel+1

CVE-2025-21988 · Published 2025-02-20 · Updated 2026-03-13

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 A data corruption issue exists in the Linux kernel's network file system read collect functionality. When multiple subrequests donate data to the same "next" request, depending on the subrequest completion order, each of them overwrites the prev donated field, causing data corruption and a BUG() crash.

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

Exploit

Weakness Enumeration

CWE-99

Related Identifiers

BDU:2025-05646

CVE-2025-21988

Affected Products

Astra Linux

Linux Kernel

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21988.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2025-21988 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21988 · Vendor Advisory
• https://git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121 · Patch
• https://git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9e · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21988 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2025-21988 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-21988 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21988 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21988 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21988 · Security Note
• https://bdu.fstec.ru/vul/2025-05646 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2025-21988 · Vendor Advisory
• https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024 · Patch
• https://docs.bell-sw.com/security/cves/CVE-2025-21988 · Note