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VulnerabilityPublished Updated

CVE-2026-95508: Red Hat Enterprise Linux 10 · Out-of-bounds Write

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.4 High.

Data as of 5 Nov 2026, 11:40 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.4
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10libslirpAffected–Fixed in–
Red Hat Enterprise Linux 8container-tools:rhel8/libslirpAffected–Fixed in–
Red Hat Enterprise Linux 9libslirpAffected–Fixed in–
Red Hat OpenShift Container Platform 4libslirpAffected–Fixed in–
Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8Affected–Fixed in–
Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-9Affected–Fixed in–

AI-suggested

Do not configure the SlirpConfig.if_mtu parameter below the IPv6 minimum link MTU of 1280 bytes. Since default installations use a standard MTU of 1500 bytes, they are not vulnerable.

Description

CVE-2026-95508 is a heap-based buffer overflow vulnerability in the DHCPv6 and TFTP response builders of libslirp used in Red Hat Enterprise Linux 10. It occurs when the host network interface MTU is manually configured below 1280 bytes, allowing a guest-supplied DHCPv6 CLIENTID or TFTP blksize option to overflow the reply buffer. This can lead to denial of service or potentially arbitrary code execution in the host process. Default installations with the standard 1500-byte MTU are not affected.

References

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