Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-6387

CVE-2024-6387HIGH

Openssh: regresshion - race condition in ssh allows rce/dos

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  H  H  H    8.1   .9951   99.9     —

AFFECTED
  Product                                                         Versions     Fixed
  OpenSSH                                                         8.5p1 –      —
  Red Hat Enterprise Linux 9                                      unspecified  0:8.7p1-38.el9_4.1
  Red Hat Enterprise Linux 9                                      unspecified  0:8.7p1-38.el9_4.1
  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions  unspecified  0:8.7p1-12.el9_0.1
  Red Hat Enterprise Linux 9.2 Extended Update Support            unspecified  0:8.7p1-30.el9_2.4
  Red Hat OpenShift Container Platform 4.13                       unspecified  413.92.202407091321-0
  Red Hat OpenShift Container Platform 4.14                       unspecified  414.92.202407091253-0
  Red Hat OpenShift Container Platform 4.15                       unspecified  415.92.202407091355-0
  Red Hat OpenShift Container Platform 4.16                       unspecified  416.94.202407081958-0
  Red Hat Ceph Storage 5                                          unspecified  —
  + 7 more

TIMELINE
  Jun 27  Reserved by redhat
  Jul 1   Published (CNA: redhat)
  Aug 31  EXPLOIT PUBLISHED — CVE-2024-6387 (OpenSSH). Public exploit reference added.
  Sep 1   EXPLOIT PUBLISHED — CVE-2024-6387 (OpenSSH). Public exploit reference added.

CWE-362, CWE-364 · CNA: redhat · CVSS v3.1 · 81 references · NVD status: Modified

Description

A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
June 27, 2024	Reserved	Reserved by redhat
July 1, 2024	Published	Published (CNA: redhat)
August 31, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2024-6387 (OpenSSH). Public exploit reference added.
September 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2024-6387 (OpenSSH). Public exploit reference added.

Affected

Affected products and packages — 17 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
—	OpenSSH	—	8.5p1	—
Red Hat	Red Hat Enterprise Linux 9	—	—	0:8.7p1-38.el9_4.1
Red Hat	Red Hat Enterprise Linux 9	—	—	0:8.7p1-38.el9_4.1
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	—	—	0:8.7p1-12.el9_0.1
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	—	—	0:8.7p1-30.el9_2.4
Red Hat	Red Hat OpenShift Container Platform 4.13	—	—	413.92.202407091321-0
Red Hat	Red Hat OpenShift Container Platform 4.14	—	—	414.92.202407091253-0
Red Hat	Red Hat OpenShift Container Platform 4.15	—	—	415.92.202407091355-0
Red Hat	Red Hat OpenShift Container Platform 4.16	—	—	416.94.202407081958-0
Red Hat	Red Hat Ceph Storage 5	—	—	—
Red Hat	Red Hat Ceph Storage 6	—	—	—
Red Hat	Red Hat Ceph Storage 7	—	—	—
Red Hat	Red Hat Enterprise Linux 10	—	—	—
Red Hat	Red Hat Enterprise Linux 6	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—	—

Weaknesses

CWE-362 · CWE-364

References (81)

http://seclists.org/fulldisclosure/2024/Jul/18 [Mailing List]
http://seclists.org/fulldisclosure/2024/Jul/19 [Mailing List]
http://seclists.org/fulldisclosure/2024/Jul/20 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/01/12 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/01/13 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/02/1 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/03/1 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/03/11 [Exploit, Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/03/2 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/03/3 [Mailing List, Patch]
http://www.openwall.com/lists/oss-security/2024/07/03/4 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/03/5 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/04/1 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/04/2 [Exploit, Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/08/2 [Exploit, Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/08/3 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/09/2 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/09/5 [Exploit, Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/10/1 [Exploit, Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/10/2 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/10/3 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/10/4 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/10/6 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/11/1 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/11/3 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/23/4 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/23/6 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/28/2 [Mailing List]
http://www.openwall.com/lists/oss-security/2024/07/28/3 [Mailing List]
https://access.redhat.com/errata/RHSA-2024:4312 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4340 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4389 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4469 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4474 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4479 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2024:4484 [Third Party Advisory]
https://access.redhat.com/security/cve/CVE-2024-6387 [Third Party Advisory]
https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/ [Third Party Advisory]
https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/ [Press/Media Coverage, Third Party Advisory]
https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server [Press/Media Coverage, Third Party Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2294604 [Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-446545.html
https://explore.alas.aws.amazon.com/CVE-2024-6387.html [Third Party Advisory]
https://forum.vmssoftware.com/viewtopic.php?f=8&t=9132 [Issue Tracking]
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc [Release Notes]
https://github.com/AlmaLinux/updates/issues/629 [Issue Tracking]
https://github.com/Azure/AKS/issues/4379 [Issue Tracking]
https://github.com/PowerShell/Win32-OpenSSH/discussions/2248 [Issue Tracking]
https://github.com/PowerShell/Win32-OpenSSH/issues/2249 [Issue Tracking]
https://github.com/microsoft/azurelinux/issues/9555 [Issue Tracking]
https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09 [Patch]
https://github.com/oracle/oracle-linux/issues/149 [Issue Tracking]
https://github.com/rapier1/hpn-ssh/issues/87 [Issue Tracking]
https://github.com/zgzhang/cve-2024-6387-poc [Third Party Advisory]
https://lists.almalinux.org/archives/list/announce@lists.almalinux.org/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/ [Third Party Advisory]
https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html [Mailing List, Release Notes]
https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html [Mailing List, Patch]
https://news.ycombinator.com/item?id=40843778 [Issue Tracking, Patch]
https://packetstorm.news/files/id/190587/ [Broken Link]
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010 [Third Party Advisory]
https://santandersecurityresearch.github.io/blog/sshing_the_masses.html [Exploit, Third Party Advisory]
https://security-tracker.debian.org/tracker/CVE-2024-6387 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20240701-0001/ [Third Party Advisory]
https://sig-security.rocky.page/issues/CVE-2024-6387/ [Third Party Advisory]
https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/ [Press/Media Coverage, Third Party Advisory]
https://support.apple.com/kb/HT214118 [Third Party Advisory]
https://support.apple.com/kb/HT214119 [Third Party Advisory]
https://support.apple.com/kb/HT214120 [Third Party Advisory]
https://ubuntu.com/security/CVE-2024-6387 [Third Party Advisory]
https://ubuntu.com/security/notices/USN-6859-1 [Third Party Advisory]
https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do [Third Party Advisory]
https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100 [Third Party Advisory]
https://www.exploit-db.com/exploits/52269 [Exploit]
https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc [Third Party Advisory]
https://www.openssh.com/txt/release-9.8 [Release Notes, Third Party Advisory]
https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt [Exploit, Third Party Advisory]
https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html [Third Party Advisory]
https://www.suse.com/security/cve/CVE-2024-6387.html [Third Party Advisory]
https://www.theregister.com/2024/07/01/regresshion_openssh/ [Press/Media Coverage, Third Party Advisory]
https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387 [Exploit, Third Party Advisory]

Authoritative record: CVE-2024-6387 at cve.org

Vendors: red hat

Weaknesses: CWE-362 · CWE-364

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-6387 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 Sunday, October 4, 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.