PT-2024-11364 · Linux+2 · Linux Kernel+2

Jason Wang · Published 2021-09-19 · Updated 2024-07-03 · CVE-2021-47367

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description The issue is related to the virtio-net component in the Linux kernel, where pages leak when building skb in big mode. This happens because the code tries to use build skb() when there is sufficient tailroom, but it forgets to release the unused pages chained via private in big mode, resulting in page leaks. The fix involves releasing the pages after building the skb in big mode.

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

Memory Leak

Buffer Overflow

Weakness Enumeration

CWE-401

CWE-119

Related Identifiers

BDU:2025-07518

CVE-2021-47367

OPENSUSE-SU-2024_2189-1

SUSE-SU-2024:2008-1

SUSE-SU-2024:2011-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2189-1

SUSE-SU-2024:2190-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1244

• https://osv.dev/vulnerability/SUSE-SU-2024:2019-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47367 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2190-1 · Vendor Advisory
• https://git.kernel.org/stable/c/f020bb63b5d2e5576acadd10e158fe3b04af67ba · Patch
• https://git.kernel.org/stable/c/afd92d82c9d715fb97565408755acad81573591a · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47367 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47367 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2008-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47367 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47367 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47367 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-07518 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2189-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47367 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2011-1 · Vendor Advisory