PT-2024-11299 · Linux+1 · Linux Kernel+1

John Fastabend · Published 2021-07-15 · Updated 2024-12-23 · CVE-2021-47298

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 potential memory leak has been identified in the Linux kernel, specifically in the bpf and sockmap components. The issue arises when the skb linearize function is needed but fails, potentially leading to a memory leak during error handling. To address this, the fix ensures that the msg block is freed using kfree before returning an error. This issue was discovered during a code review.

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2025-07388

CVE-2021-47298

Affected Products

Astra Linux

Linux Kernel

References · 17

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47298 · Vendor Advisory
• https://git.kernel.org/stable/c/6c508a1c6c62793dc6e6872cad4b200097bab7c9 · Patch
• https://git.kernel.org/stable/c/7e6b27a69167f97c56b5437871d29e9722c3e470 · Patch
• https://osv.dev/vulnerability/CVE-2021-47298 · Vendor Advisory
• https://git.kernel.org/stable/c/715f378f42909c401ec043f5150c4fdf57fb8889 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47298 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-47298 · Security Note
• https://bdu.fstec.ru/vul/2025-07388 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47298 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47298 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47298 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2024052125-CVE-2021-47298-22d6@gregkh · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6 · Note
• https://git.kernel.org/linus/7e6b27a69167f97c56b5437871d29e9722c3e470 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54 · Note