CVE-2020-29363: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2020-29363 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 3.53% chance of exploitation in the next 30 days, higher than 89.2% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 16-12-2020PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
An issue was discovered in p11-kit 0.23.6 through 0.23.21. A heap-based buffer overflow has been discovered in the RPC protocol used by p11-kit server/remote commands and the client library. When the remote entity supplies a serialized byte array in a CK_ATTRIBUTE, the receiving entity may not allocate sufficient length for the buffer to store the deserialized value.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.53%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.53% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- p11-kit< 0.23.22-1
- debian_linuxEOL10.0
Alpine1 product
- p11-kit≥ 0.23.6, < 0.23.16.1-r1 | ≥ 0.23.6, < 0.23.18.1-r1 | ≥ 0.23.6, < 0.23.22-r0
Oracle1 product
P11-kit_project1 product
- p11-kit≥ 0.23.6, < 0.23.22
Ubuntu1 product
- p11-kit< 0.23.9-2ubuntu0.1 | < 0.23.20-1ubuntu0.1
5 vendors · 6 products
References
12 links
- github.com/p11-glue/p11-kit/security/advisories/GHSA-5j67-fw89-fp6xX Refsource MISCREPORTThird Party Advisory
