VulnerabilityModified
CVE-2020-29367
blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.
HIGH 7.8EPSS 1.20%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.20% probability · 68th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- blosc/c-blosc2
- Source
- cve@mitre.org
EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26442Mailing List, Third Party Advisory
- https://github.com/Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043eePatch, Third Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26442Mailing List, Third Party Advisory
- https://github.com/Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043eePatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.