CVE-2026-72061
Local kernel bug allows altering IPIP/SIT tunnels across network namespaces.
Is CVE-2026-72061 being exploited?
Not confirmed. CVE-2026-72061 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 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-72061?
CVE-2026-72061 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-2026-72061?
Yes. A fix has been recorded for CVE-2026-72061. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72061 affect?
CVE-2026-72061 affects Linux kernel (net/sit module), IPIP/SIT tunnels, Systems using network namespaces (containers, VMs). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72061?
Apply Linux kernel updates and restrict CAP_NET_ADMIN capability.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker with CAP_NET_ADMIN in one netns can modify tunnels in another netns, enabling traffic redirection, interception, or network config tampering.
Patch when possible
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < cb41b308e9d867725d965b291dd085028e36a480
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < c5a0ae895432596b2f464172da8218e2d84e2932
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < 7d139dec96691cde96cb40ed293e2d13d994fb4f
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < 388ccffbd2e7e5e4271f291085a7451865705305
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < c0ea1aedb37bb979e864ed7787975434bbd9db73
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < 3118e97dae533fb45964b87bbed1801afcff7c65
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < 99ae3248b33df94201915d9c32e7470cdf08cfcd
- affected>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 and < 27ccb68e7cccead5d8c611665a45d23032d468b3
- affected3.11
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.