OSV-2025-890 Heap-buffer-overflow in icalmemory_tmp_copy
Not scored
Published
Check this codebase for OSV-2025-890 and fix it if it is affected.
What it is: OSV-2025-890 is a memory corruption vulnerability in libical, published on 10 Nov 2025.
Exploitation: There is no known exploitation of OSV-2025-890 in the wild and no public exploit code.
Affected packages and fixed versions:
- libical (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-2025-890/ (Markdown: https://insights.sbomify.com/OSV-2025-890/index.md)
A heap buffer overflow in the iCalendar library allows attackers to cause crashes or potentially execute code via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2025-890?
OSV-2025-890 is a memory corruption vulnerability in libical, published on 10 Nov 2025.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=458943970
Crash type: Heap-buffer-overflow WRITE 1
Crash state:
icalmemory_tmp_copy
icalreqstattype_from_string
icalvalue_new_from_string
Which versions are affected by OSV-2025-890?
1 open source package ship an affected version, including libical.
| Package | Affected | Fixed in |
|---|---|---|
libical OSS-Fuzz | All versions | None |
How do I fix OSV-2025-890?
No fix has been published for OSV-2025-890 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-2025-890 being exploited?
There is no known exploitation of OSV-2025-890 in the wild and no public exploit code.