CVE-2026-0967: Red Hat Enterprise Linux 10 · ReDoS
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 2.2 Low.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 26 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libssh | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9libssh | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9libssh | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6libssh2 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7libssh2 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libssh | Affected– | Fixed in– |
AI-suggested
An official security update from Red Hat is available that addresses this vulnerability by updating libssh to version 0.12.0. Users of Red Hat Enterprise Linux 10 should apply the update as described in the Red Hat advisory RHSA-2026:18160 and the referenced article https://access.redhat.com/articles/11258. Applying this update will remediate the denial of service issue caused by inefficient regular expression processing. No additional mitigation steps are required beyond applying the official patch.
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.
References
- access.redhat.com/errata/RHSA-2026:18160 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:18683 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-0967 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2436981 (opens in a new tab)
- libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/ (opens in a new tab)