Is there a public exploit for CVE-2026-100395?

No public exploit for CVE-2026-100395 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-100395?

CVE-2026-100395 scores CVSS 6.8 (v4.0), rated medium.

What does CVE-2026-100395 affect?

CVE-2026-100395 affects lxc LXC.

6.8 Medium

LXC is a userspace interface for the Linux kernel containment features used to create and manage system containers.

CVE-2026-100395

LXC is a userspace interface for the Linux kernel containment features used to create and manage system containers. In LXC 7.0.0 and earlier, lxc-copy and the public liblxc clone() API can follow attacker-controlled symbolic links while updating /etc/hostname in a copied container root filesystem. The affected surfaces are lxc-copy and liblxc's public lxccontainer::clone() API. The privileged cloning process must run as root. The source rootfs must be attacker-controlled or less trusted. A symlink can be placed at etc/hostname or in an intermediate component. The clone operation preserves the symlink before updating the hostname. The vulnerable write truncates and overwrites an existing file outside the destination rootfs. When root clones an untrusted container without LXCCLONEKEEPNAME, the copied symlink can resolve outside the destination rootfs and cause the privileged process to overwrite an existing host file with the destination container name. Unprivileged use and managers with independent cloning implementations are not affected. LXCCLONEKEEPNAME avoids the hostname update and therefore the affected write.

Assessment

CVSS: 6.8 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 November 2026
Last updated: 5 November 2026
Affected: lxc · LXC
Assigner: GitHub_M

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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