CVE-2021-22555

🔥 Known Exploited (CISA KEV)HIGH

8.3

CVSS Severity Score

EPSS Score56.0610%

EPSS Percentile90.86th

Published2021-07-07

Last Modified2025-10-27

Data SourcesNVDCISA KEVFIRST.org EPSS

Vulnerability Description

A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space

Affected Platforms (CPE)

💻

Netapp

C400 Firmware

All versions

💻

Netapp

C250 Firmware

All versions

💻

Netapp

H410c Firmware

All versions

💻

Netapp

H300s Firmware

All versions

References & Advisories

🔗 http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html

🔗 http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html

🔗 http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html

🔗 http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.html

🔗 http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html

🔗 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21

🔗 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d

🔗 https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528

CVE-2021-22555

Vulnerability Description

Affected Platforms (CPE)

C400 Firmware

C250 Firmware

H410c Firmware

H300s Firmware

References & Advisories

関連するセキュリティ記事

デイリー・グローバル・サイバー脅威インテリジェンス・ダイジェスト｜2026年7月30日

デイリー・グローバル・サイバー脅威インテリジェンス・ダイジェスト｜2026年7月29日

関連する脆弱性情報