OSV-2025-266 Heap-buffer-overflow in lj_buf_ruleb128
Not scored
Published
Check this codebase for OSV-2025-266 and fix it if it is affected.
What it is: OSV-2025-266 is a memory corruption vulnerability in tarantool, published on 8 Apr 2025.
Exploitation: There is no known exploitation of OSV-2025-266 in the wild and no public exploit code.
Affected packages and fixed versions:
- tarantool (OSS-Fuzz): affected all versions; no fix listed
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/OSV-2025-266/ (Markdown: https://insights.sbomify.com/OSV-2025-266/index.md)
A heap-buffer-overflow in the LuaJIT bytecode reader allows attackers to cause crashes or potentially execute arbitrary code via malicious bytecode.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-266?
OSV-2025-266 is a memory corruption vulnerability in tarantool, published on 8 Apr 2025.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=408513931
Crash type: Heap-buffer-overflow READ 1
Crash state:
lj_buf_ruleb128
lj_bcread
cpparser
Which versions are affected by OSV-2025-266?
1 open source package ship an affected version, including tarantool.
| Package | Affected | Fixed in |
|---|---|---|
tarantool OSS-Fuzz | All versions | None |
How do I fix OSV-2025-266?
No fix has been published for OSV-2025-266 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 OSV-2025-266 being exploited?
There is no known exploitation of OSV-2025-266 in the wild and no public exploit code.