CVE-2026-59143 Memory corruption in Data::RoaringBitmap::Shared
A local attacker can trigger an out-of-bounds read and potential crash in the Perl Data::RoaringBitmap::Shared library by manipulating the backing file.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59143?
CVE-2026-59143 is a medium-severity memory corruption vulnerability in EGOR Data::RoaringBitmap::Shared, published on 21 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Data::RoaringBitmap::Shared versions before 0.02 for Perl allow an out-of-bounds read via an unvalidated container offset and cardinality in rb_contains_locked.
The attach-time validator rb_validate_header checks the header scalars and region layout against the file size, but does not validate the bucket contents it then trusts. rb_contains_locked forms a container pointer as pool + container_off * 8192 from a raw file-stored offset and then searches over a file-stored cardinality, neither bounded against the container pool capacity or the fixed 8192-byte slot size.
A local peer that can write the backing file can leave the header valid while poisoning a bucket, so the next membership query dereferences a file-controlled wild pointer and scans a file-controlled count, reading adjacent memory or crashing the process.
Weakness: CWE-125
Which versions are affected by CVE-2026-59143?
How do I fix CVE-2026-59143?
No fix has been published for CVE-2026-59143 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-59143 being exploited?
There is no known exploitation of CVE-2026-59143 in the wild and no public exploit code.
Sources
Also known as GHSA-96m7-w48r-fx74.