CVE-2020-29129: debian debian_linux Out-of-bounds Read
Vulnerability summary
CVE-2020-29129 is a medium (CVSS 4.3) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 1.46% chance of exploitation in the next 30 days, higher than 73.6% of scored vulnerabilities.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 17Timeline
- 26-11-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the total packet length.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- OSV · AlpineEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
1.46%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.46% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian3 products
- libslirp< 4.4.0-1
- qemu< 1:4.1-2
- debian_linuxEOL10.0
Alpine1 product
- libslirp< 4.4.0-r0
Fedoraproject1 product
- fedoraEOL32 | 33
Libslirp_project1 product
- libslirp≤ 4.3.1
Ubuntu1 product
- libslirp< 4.1.0-2ubuntu2.2
5 vendors · 7 products
References
10 links- lists.freedesktop.org/archives/slirp/2020-November/000115.htmlX Refsource MISCREPORTMailing ListVendor Advisory
- www.openwall.com/lists/oss-security/2020/11/27/1Mailing ListX Refsource MLISTREPORTThird Party Advisory
lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListX Refsource MLISTThird Party Advisory