CVE-2026-72054
Local privilege escalation in Linux kernel VTI netns capability check
Is CVE-2026-72054 being exploited?
Not confirmed. CVE-2026-72054 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.17% probability of exploitation in the next 30 days.
How severe is CVE-2026-72054?
CVE-2026-72054 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-72054?
Yes. A fix has been recorded for CVE-2026-72054. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72054 affect?
CVE-2026-72054 affects Linux kernel (ip_vti / vti_changelink), Hosts using network namespaces / containers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72054?
Install vendor kernel updates; restrict CAP_NET_ADMIN; audit netns/container privileges.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local privilege escalation: attacker with CAP_NET_ADMIN in one netns can modify tunnels in another netns, breaking isolation and gaining elevated network control.
Patch when possible
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 1caf737e625143c6f23c32d2b747b1a3e42e5699
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 32edf8aa297745226854eda2d96c0fac66c1bb15
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 973ead9e565423642e4533e1547b5d2c0476fb03
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 33fd93961557ec8e3e9958995b28684c5f949394
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 6d8bc0dc99472d62c57c2a3d436e6ab408592bda
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 9571af2eec8023af9a1671b7f2cd4ab400011724
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 88b33ee458a6ca5fbef6c53b9dba772da69dab68
- affected>= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e and < 95cceadbfd52d7239bd730afdda0655287d77425
- affected3.15
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.