CVE catalog

CVE-2021-27419

uclibc: CVE-2021-27419

[CVE catalog]

Severity
High · CVSS 7.4CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
1.72% · Oct 25, 2026

uClibc-ng versions prior to 1.0.37 are vulnerable to integer wrap-around in functions malloc-simple. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianuclibcsid1.0.54-1fixed
Debianuclibcforky1.0.54-1fixed
Debianuclibctrixie1.0.35-1vulnerable
Debianuclibcbookworm1.0.35-1vulnerable

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianuclibcsourcesid1.0.54-1unimportantNot reported[1010748]
Debianuclibcsourceforky1.0.54-1unimportantNot reported[1010748]
Debianuclibcsourcetrixie(unfixed)unimportantNot reported[1010748]
Debianuclibcsourcebookworm(unfixed)unimportantNot reported[1010748]

[Debian bug #1010748]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [uclibc-source]Affected

    Source package: [uclibc]

    Details (2)

    • 1.0.35-1 · all · bookworm

      Affected

      dsa · uclibc · debian · bookworm; dsa · uclibc · debian · 12

    • 1.0.35-1 · all · bookworm

      Affected

      dsa · uclibc · debian · bookworm; dsa · uclibc · debian · 12

[Debian 13 (Trixie)]

  • [uclibc-source]Affected

    Source package: [uclibc]

    Details (2)

    • 1.0.35-1 · all · trixie

      Affected

      dsa · uclibc · debian · 13

    • 1.0.35-1 · all · trixie

      Affected

      dsa · uclibc · debian · 13

Observed:

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]