CVEvulnerability
CVE-2021-4159
4.4 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-08-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.4 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-202
Description
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Affected configurations
• linux linux kernel (< 5.7)
• redhat enterprise linux 8.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-202 Exposure of Sensitive Information Through Data Queries weakness
References
- https://access.redhat.com/security/cve/CVE-2021-4159 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036024 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-4159 Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4159 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036024 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html Mailing List, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2021-4159 Third Party Advisory