CVE-2024-6409
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Openssh: possible remote code execution due to a race condition in signal handling affecting red hat enterprise linux 9
rank 26 = 7 + 18 + 1 + 0 + 0
rank@v1 · scheduled
Someone is already using it
CISA KEV catalog · public proof-of-concept · FIRST EPSS
EPSS 0.27935 · without this subject the record ranks 19
What it costs you if it fires
NVD CVSS base score, then the CNA's own
CVSS 7.0, from the CNA · without this subject the record ranks 8
It is getting worse, not staying still
FIRST EPSS series, rescorings and bad loads removed
rose on 2025-09-04 · without this subject the record ranks 25
How much of the world it touches
NVD CPE configurations
0 products in the CPE ranges · without this subject the record ranks 26
Someone else already set the date
CISA KEV remediation due date
no CISA due date · without this subject the record ranks 26
$1.12M = $4.99M incident cost x 0.8004932139359172 exposure x 0.27935 likelihood
udv@v1 · unaudited · wrong for you until you say what you run
$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.
Hindsight · the state
Foresight · where to check next
No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.
Running Red Hat Enterprise Linux 9? Check your version
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Harm, if it fires from the vector and the weakness
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CISA KEV & Federal Remediation Deadline from the record and CISA
The fix, and how long it's been waiting.
Exploit Status & Known PoCs a ladder, not a score
Current rung: Nothing observed in held sources.
- RUNG 1Nothing observed in held sources
- RUNG 2Proof-of-concept published
- RUNG 3Exploited in the wild · CISA KEV listed
- RUNG 4Ransomware campaign use known
Affected & Fixed Versions as published
A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.
Attack path
What it is stated by the CNA
A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server. receipt
NVD's analysis a second authority
- weakness
- CWE-364
- also scored by
- [email protected] 7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
check it yourself access.redhat.com access.redhat.com access.redhat.com access.redhat.com access.redhat.com access.redhat.com +3 morereceipt
Dated events
Movement the material steps
Show all 55 observations
55 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt
The full biography
The record had been public for 1 year, 11 months when this index was last written.
Siblings and hubs
Records related to this one
No record cites this identifier and it carries no alias. Its defect family is below.
Its defect family
red hat enterprise linux 9
Of the 2 records in this family, this is the only one that does not hold public proof-of-concept code. That is a fact about what the catalogue records, not a finding about exposure.
Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.
Family membership: held values
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Browse the index from here
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What usually comes next
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