CVE-2026-103111 Memory corruption in PCRE2
An out-of-bounds write in PCRE2 allows arbitrary code execution when processing attacker-controlled regexes with specific JIT API usage.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-103111?
CVE-2026-103111 is a high-severity memory corruption vulnerability in PCRE2, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.
Weakness: CWE-787
Which versions are affected by CVE-2026-103111?
Linux distribution packages (8)
pcre2 Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-devel Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-static Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-syntax Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-tools Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-utf16 Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2-utf32 Red Hat:hummingbird:1 | All versions | 0:10.49-0.1.hum1 |
pcre2 openSUSE:Tumbleweed | All versions | 10.49-2.1 |
How do I fix CVE-2026-103111?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-103111 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-103111 exists.
Sources
Also known as ALPINE-CVE-2026-103111, AZL-105119, AZL-105381, AZL-105639, AZL-105735, AZL-105834 and 15 more.