vulnerability
Red Hat: CVE-2021-22555: CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:N/C:P/I:P/A:P) | Jul 7, 2021 | Aug 12, 2021 | Mar 27, 2026 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
Jul 7, 2021
Added
Aug 12, 2021
Modified
Mar 27, 2026
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
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
References
Rapid7 Labs
2026 Global Threat Landscape Report
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