CVE-2026-95818 AT_SECURE program buffer overflow via $ORIGIN processing
A local attacker can trigger a stack buffer overflow in the glibc dynamic loader when processing specific $ORIGIN paths, causing crashes or memory disclosure in setuid programs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-95818?
CVE-2026-95818 is a low-severity memory corruption vulnerability in The GNU C Library glibc, published on 22 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A stack-based buffer overflow in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to crash or corrupt the memory of setuid/setgid (AT_SECURE) programs.
When such a program's DT_RPATH or DT_RUNPATH begins with $ORIGIN and is followed by NUL or '/' the loader both reads past the end of the path buffer and writes past the end of a stack-allocated internal buffer. The corrupted loader stack can lead to a loader crash (denial of service) and limited disclosure of process memory.
Weakness: CWE-121
Which versions are affected by CVE-2026-95818?
How do I fix CVE-2026-95818?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-95818 being exploited?
There is no known exploitation of CVE-2026-95818 in the wild and no public exploit code.
Sources
Also known as AZL-103416, DEBIAN-CVE-2026-95818, ECHO-f127-8d9c-ea3a, GHSA-h8x4-734c-9753, UBUNTU-CVE-2026-95818.