8.3
CVE-2021-22555
- EPSS 82.42%
- Published 07.07.2021 12:15:08
- Last modified 07.10.2025 01:00:02
- Source cve-coordination@google.com
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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
Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.19 < 4.4.267
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.267
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.231
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.188
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.113
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.31
Linux ≫ Linux Kernel Version >= 5.11 < 5.12
Brocade ≫ Fabric Operating System Version-
Netapp ≫ Fas 8300 Firmware Version-
Netapp ≫ Fas 8700 Firmware Version-
Netapp ≫ Aff A400 Firmware Version-
Netapp ≫ Aff A250 Firmware Version-
Netapp ≫ Aff 500f Firmware Version-
Netapp ≫ H610c Firmware Version-
Netapp ≫ H610s Firmware Version-
Netapp ≫ H615c Firmware Version-
Netapp ≫ Hci Management Node Version-
06.10.2025: CISA Known Exploited Vulnerabilities (KEV) Catalog
Linux Kernel Heap Out-of-Bounds Write Vulnerability
VulnerabilityLinux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space.
DescriptionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Required actions| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 82.42% | 0.992 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| nvd@nist.gov | 7.8 | 1.8 | 5.9 |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
|
| nvd@nist.gov | 4.6 | 3.9 | 6.4 |
AV:L/AC:L/Au:N/C:P/I:P/A:P
|
| cve-coordination@google.com | 8.3 | 1.6 | 6 |
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
|
CWE-787 Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.