CVE-2026-14258: Red Hat Enterprise Linux 10 · Loop with Unreachable Exit Condition
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 12 Nov 2026, 23:24 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 6.5 |
|---|
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 1 Jul 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 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10dhcpcd | Affected– | Fixed in– |
AI-suggested
Red Hat has released updated dhcpcd packages that fix this vulnerability. Administrators should apply the security update (e.g., dhcpcd-10.0.6-11.el10_2) as soon as possible. Until the update is applied, mitigation includes disabling IPv6 Router Advertisement processing on interfaces where it is not required or restricting acceptance of untrusted ICMPv6 Router Advertisements using network filtering. Systems relying on IPv6 Stateless Address Autoconfiguration or Router Advertisement-based configuration should evaluate operational impact before applying these mitigations.
Description
A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a denial of service.
References
- access.redhat.com/security/cve/CVE-2026-14258 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2462305 (opens in a new tab)
- github.com/NetworkConfiguration/dhcpcd/commit/75289ca (opens in a new tab)
- github.com/NetworkConfiguration/dhcpcd/issues/415 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:54210 (opens in a new tab)