CVE-2021-31871: debian debian_linux Integer Overflow or Wraparound
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-31871DEBIAN-CVE-2021-31871
Published 30-04-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-31871 is a high (CVSS 7.5) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.88%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 30-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- 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
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.88%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
0.00 pp
From 1.88% on 19-09-2026
19-09-202619-10-2026
EPSS score1.88%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- klibc< 2.0.8-6
- debian_linuxEOL9.0
Klibc_project1 product
- klibc< 2.0.9
Ubuntu1 product
- klibc< 2.0.3-0ubuntu1.14.04.3+esm2 | < 2.0.4-8ubuntu1.16.04.4+esm1 | < 2.0.4-9ubuntu2.1 | < 2.0.7-1ubuntu5.1
3 vendors · 4 products
References
9 links- lists.zytor.com/archives/klibc/2021-April/004593.htmlX Refsource MISCREPORTMailing ListRelease NotesThird Party Advisory
- git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5X Refsource MISCPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/04/30/1Mailing ListX Refsource MLISTRelease NotesThird Party Advisory
lists.debian.org/debian-lts-announce/2021/06/msg00025.htmlMailing ListX Refsource MLISTThird Party Advisory