2.2
Low
CVE-2026-0967 Libssh: libssh: denial of service via inefficient regular expression processing
Description
A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.
CVSS 3.0 detail
Vector CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:LExploitable with local access to the machine, with an ordinary account and if a user takes an action; the impact on data or service is limited.
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- Interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat OpenShift Container Platform 4 | Versions not published | |
| Red Hat Hardened Images | Versions not published |
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Not rated