highREV. 01
CVE-2024-6387regreSSHion — Signal Handler Race in the OpenSSH Server
A regression reintroduced an unsafe signal handler in the OpenSSH server, so an unauthenticated attacker who wins a race runs code as the highest-privileged account.
Read the risk
THE VITAL STATS- CVSS score
- 8.1/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- High Conditions needed to exploit
- Known exploited
- Not listed
- CVE published
- 2024-07-01
- Exploit published
- Yes
- Confidence
- medium
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to the server, and a great many attempts
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisoryopenwall.comopenwall.com
- 03Vendor advisorygithub.comgithub.com
- 04Vendor advisorylists.mindrot.orglists.mindrot.org
- 05Vendor advisorynews.ycombinator.comnews.ycombinator.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-08-07 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-08-07 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.