CVE-2021-22555

Katalog CVE

CVSS 7.8 · High KEV · sudah dieksploitasi EPSS 78,7%

Kerentanan Out-of-bounds Write pada netapp c400 firmware, netapp c250 firmware +19 lainnya. Skor CVSS 3.1 7.8 (High) menurut NVD. Masuk katalog KEV CISA pada 6 Oktober 2025, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

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

Rincian

Terbit di NVD

7 Juli 2021

Terakhir diubah

13 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

7.8 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-787: Out-of-bounds Write

EPSS (30 hari)

78,7% peluang dieksploitasi; lebih tinggi dari 99,5% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Linux Kernel Heap Out-of-Bounds Write Vulnerability

Masuk KEV

6 Oktober 2025

Tenggat CISA

27 Oktober 2025 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cd... mailing list · patch · advisory vendor
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a... mailing list · patch · advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22555 pemerintah AS
• http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html advisory pihak ketiga · vdb entry
• http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html exploit · advisory pihak ketiga · vdb entry
• http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html exploit · advisory pihak ketiga · vdb entry
• http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.h... exploit · advisory pihak ketiga · vdb entry
• http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html exploit · advisory pihak ketiga · vdb entry
• https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528 exploit · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210805-0010/ advisory pihak ketiga