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CVE-2020-29367

24
FAUCET Score

CVE-2020-29367 is a heap-based buffer overflow vulnerability in Blosc C-Blosc2 versions up to 2.0.0.beta.5, occurring when insufficient space is allocated for compressed data. It carries a high CVSS score of 7.8, indicating a local attack vector with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage for this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha2:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha3:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha4:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha5:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:blosc:c-blosc2:2.0.0:beta1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 62nd percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: blosc2Fixed in: 0.1.7
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: blosc
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: blosc
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16.1Fixed in: blosc

Vendor Advisories (2)

pipGHSA-8c7c-2c8j-3xfphigh

blosc2 heap-based buffer overflow

May 24, 2022
redhatCVE-2020-29367Moderate

blosc: heap-based buffer overflow when there is a lack of space to write compressed data

Nov 18, 2020

References

bugs.chromium.org / p/oss-fuzz/issues/detail
Mailing ListThird Party Advisory
github.com / Blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee
PatchThird Party Advisory