PatchTheCVECVE-2026-34353: In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memor
CVE-2026-34353 is a medium-severity flaw (CVSS 5.9) affecting ocaml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 98%) |
| CISA exploited list | No |
| Weakness | CWE-190 |
| Published | 2026-03-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34353?
ocaml: upgrade to newer than 4.14.3. Exact commands for each OS are on this page.
Is CVE-2026-34353 being exploited?
CVE-2026-34353 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34353 affect?
CVE-2026-34353 affects ocaml. Severity is medium (CVSS 5.9). In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.
How urgent is CVE-2026-34353?
Priority 21/100. No elevated risk signals yet.
Related CVEs
- CVE-2026-28364 HIGH 7.9 UPGRADE In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c)