CVE-2021-31871
HIGH
7.5
CVSS Score
Published: April 30, 2021 at 05:18 AM UTC
Updated: June 17, 2026 at 03:52 AM UTC
2 products affected across 2 vendorsDebian LinuxKlibc
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 2.0.9
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (5)
Mailing Listx_refsource_MLISTRelease NotesThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/04/30/1x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://kernel.org/pub/linux/libs/klibc/2.0/Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/06/msg00025.htmlx_refsource_MISCMailing ListRelease NotesThird Party Advisory
Source: [email protected]
https://lists.zytor.com/archives/klibc/2021-April/004593.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-190
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