CVE-2025-29476
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit...
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
CVE-2025-29476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
EUVDEUVD-2025-9764
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
EUVD-2025-9764- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p53h-9vwh-rvvp
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit...
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
GHSA-p53h-9vwh-rvvp- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
NVD
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
CVE-2025-29476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-120
- Updated
- 2026-11-02
OSV
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
CVE-2025-29476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-29476
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
DEBIAN-CVE-2025-29476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-29476
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
- Record
UBUNTU-CVE-2025-29476- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
c-blosc2Debian:13 |
before 2.17.1+ds-1 | 2.17.1+ds-1 |
c-blosc2Debian:14 |
before 2.17.1+ds-1 | 2.17.1+ds-1 |
c-blosc2Ubuntu:24.04:LTS |
All versions, plus listed versions 2.12.0+ds-12.12.0+ds-22.13.1+ds-12.13.1+ds-1ubuntu12.13.1+ds-1.1ubuntu12.13.1+ds-1.1ubuntu2 |
None known |
c-blosc2Ubuntu:25.10 |
All versions, plus listed versions 2.16.0+ds-12.17.1+ds-12.17.1+ds-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-29476 is a medium vulnerability (CVSS 5.5) in c-blosc2, published April 4, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in c-blosc2 2.17.1+ds-1.
References
github.com/Blosc/c-blosc2/issues/656
nvd.nist.gov/vuln/detail/CVE-2025-29476
security-tracker.debian.org/tracker/CVE-2025-29476
ubuntu.com/security/CVE-2025-29476
cve.org/CVERecord?id=CVE-2025-29476