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-2021-28041

CVE-2021-28041HIGH

n/a n/a — ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   R  U  H  H  H    7.1   .0351   89.0     —

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

TIMELINE
  Mar 5   Reserved by mitre
  Mar 5   Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2021-28041. Received CVSS 7.1 and CPE data from NVD.

CWE-415 · CNA: mitre · CVSS v3.1 · 10 references · NVD status: Modified

Description

ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 5, 2021	Reserved	Reserved by mitre
March 5, 2021	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2021-28041. Received CVSS 7.1 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-415

References (10)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db [Patch, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/
https://security.gentoo.org/glsa/202105-35 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20210416-0002/ [Third Party Advisory]
https://www.openssh.com/security.html [Not Applicable, Vendor Advisory]
https://www.openssh.com/txt/release-8.5 [Release Notes, Vendor Advisory]
https://www.openwall.com/lists/oss-security/2021/03/03/1 [Mailing List, Patch, Third Party Advisory]
https://www.oracle.com//security-alerts/cpujul2021.html [Third Party Advisory]

Authoritative record: CVE-2021-28041 at cve.org

Weaknesses: CWE-415

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-28041 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.