PT-2025-8875 · Linux+7 · Linux Kernel+7

Eric Dumazet · CVE-2025-21763 · Published 2025-02-07 · Updated 2026-04-20

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 vulnerability in the Linux kernel has been resolved. The issue is related to the neigh notify() function, which can be called without proper protection, potentially leading to a use-after-free (UAF) condition. To address this, RCU protection is used in neigh notify().

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

Exploit

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2025-12647

ALT-PU-2025-4689

ALT-PU-2025-5012

ALT-PU-2025-5359

ALT-PU-2025-5361

ALT-PU-2025-5437

AZL-58911

AZL-58929

BDU:2025-04524

CVE-2025-21763

DLA-4102-1

DLA-4178-1

OESA-2025-1446

OESA-2025-1450

OESA-2025-1462

OESA-2025-1465

OESA-2025-1466

OPENSUSE-SU-2025_1177-1

OPENSUSE-SU-2025_1178-1

OPENSUSE-SU-2025_1180-1

SUSE-SU-2025:01919-1

SUSE-SU-2025:01951-1

SUSE-SU-2025:01967-1

SUSE-SU-2025:1177-1

SUSE-SU-2025:1178-1

SUSE-SU-2025:1180-1

SUSE-SU-2025:1293-1

SUSE-SU-2025:20190-1

SUSE-SU-2025:20192-1

SUSE-SU-2025:20260-1

SUSE-SU-2025:20270-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01967-1

SUSE-SU-2025_1177-1

SUSE-SU-2025_1178-1

SUSE-SU-2025_1180-1

SUSE-SU-2025_1293-1

USN-7510-1

USN-7510-2

USN-7510-3

USN-7510-4

USN-7510-5

USN-7510-6

USN-7510-7

USN-7510-8

USN-7511-1

USN-7511-2

USN-7511-3

USN-7512-1

USN-7516-1

USN-7516-2

USN-7516-3

USN-7516-4

USN-7516-5

USN-7516-6

USN-7516-7

USN-7516-8

USN-7516-9

USN-7517-1

USN-7517-2

USN-7517-3

USN-7518-1

USN-7521-1

USN-7521-2

USN-7521-3

USN-7539-1

USN-7540-1

USN-7593-1

USN-7602-1

USN-7640-1

USN-7703-1

USN-7703-2

USN-7703-3

USN-7703-4

USN-7719-1

USN-7737-1

Affected Products

Alt Linux

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Os

Suse

Ubuntu

References · 2614

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21763.json · Exploit
• https://ubuntu.com/security/CVE-2025-21772 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21773 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21923 · Security Note
• https://ubuntu.com/security/CVE-2025-22056 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58012 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58006 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53034 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21912 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21776 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21963 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1466 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-58011 · Security Note
• https://ubuntu.com/security/CVE-2024-53184 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57890 · Vendor Advisory