CVE-2021-4204
highAn out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation.
Vendor / product: Linux — linux kernel
An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.
CVSS
7.1
7.1 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2022-08-24 16:15
Modified: 2026-11-02 19:17
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-11-03 07:33 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
linux / linux_kernel <5.8.0, 5.8.0
debian / debian_linux 11.0
redhat / enterprise_linux 9.0
netapp / h300s_firmware all versions
netapp / h500s_firmware all versions
netapp / h700s_firmware all versions
netapp / h410s_firmware all versions
netapp / h410c_firmware all versions
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://access.redhat.com/security/cve/CVE-2021-4204
Patch / mitigation: https://www.openwall.com/lists/oss-security/2022/01/11/4
Patch / mitigation: https://access.redhat.com/security/cve/CVE-2021-4204
Patch / mitigation: https://www.openwall.com/lists/oss-security/2022/01/11/4
References
- https://access.redhat.com/security/cve/CVE-2021-4204 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2039178 secalert@redhat.com
- https://security-tracker.debian.org/tracker/CVE-2021-4204 secalert@redhat.com
- https://security.netapp.com/advisory/ntap-20221228-0003/ secalert@redhat.com
- https://www.openwall.com/lists/oss-security/2022/01/11/4 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2021-4204 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.redhat.com/show_bug.cgi?id=2039178 af854a3a-2127-422b-91ae-364da2661108
- https://security-tracker.debian.org/tracker/CVE-2021-4204 af854a3a-2127-422b-91ae-364da2661108
- https://security.netapp.com/advisory/ntap-20221228-0003/ af854a3a-2127-422b-91ae-364da2661108
- https://www.openwall.com/lists/oss-security/2022/01/11/4 af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:33 UTC · record ↗