CVE-2021-3999
HIGH 7.8EPSS 0.8%
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
- Affected
- glibc
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.81% chance of exploitation in the next 30 days, 56th percentile
- Published
- 2022-08-24
- Updated
- 2026-10-14
Proof-of-concept exploits (1)
Security advisories
- https://access.redhat.com/security/cve/CVE-2021-3999
- https://bugzilla.redhat.com/show_bug.cgi?id=2024637
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://security-tracker.debian.org/tracker/CVE-2021-3999
- https://security.netapp.com/advisory/ntap-20221104-0001
- https://sourceware.org/bugzilla/show_bug.cgi?id=28769