Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-36227

CVE-2022-36227CRITICAL

n/a n/a — In libarchive before 3.6.2, the software does not check for an error after calling calloc function that can return with a NULL pointer if…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0244   84.1     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Jul 18  Reserved by mitre
  Nov 22  Published (CNA: mitre)
  Oct 8   ENRICHED — CVE-2022-36227. Received CVSS 9.8 and CPE data from NVD.

CWE-476 · CNA: mitre · CVSS v3.1 · 7 references · NVD status: Modified

Description

In libarchive before 3.6.2, the software does not check for an error after calling calloc function that can return with a NULL pointer if the function fails, which leads to a resultant NULL pointer dereference. NOTE: the discoverer cites this CWE-476 remark but third parties dispute the code-execution impact: "In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution."

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 18, 2022	Reserved	Reserved by mitre
November 22, 2022	Published	Published (CNA: mitre)
October 8, 2026	ENRICHED	ENRICHED — CVE-2022-36227. Received CVSS 9.8 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-476

References (7)

https://bugs.gentoo.org/882521 [Issue Tracking, Patch, Third Party Advisory]
https://github.com/libarchive/libarchive/blob/v3.0.0a/libarchive/archive_write.c#L215 [Third Party Advisory]
https://github.com/libarchive/libarchive/issues/1754 [Issue Tracking, Patch, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2023/01/msg00034.html [Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2024/11/msg00007.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V67OO2UUQAUJS3IK4JZPF6F3LUCBU6IS/ [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202309-14 [Third Party Advisory]

Authoritative record: CVE-2022-36227 at cve.org

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-36227 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.