VDB
RHSA-2026:77217
RHSA-2026:77217
PUBLISHED
CVSS 7.300000190734863 HIGH
A flaw was found in the Linux kernel's IPv6 Virtual Tunnel Interface (vti6) component. An unprivileged local user, particularly within a user namespace, could exploit a vulnerability related to incorrect network namespace handling during the movement of a vti6 tunnel. This issue can lead to a kernel bug, resulting in a denial of service (system crash) and potentially impacting container isolation on affected hosts.
Risk Scores
CVSS 3.1
7.300000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | bpftool-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-debug-core-0:4.18.0-305.211.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-tools-debuginfo-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | perf-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-devel-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | perf-0:4.18.0-305.211.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | perf-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-debug-modules-extra-0:4.18.0-305.211.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | bpftool-debuginfo-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-tools-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | bpftool-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-tools-debuginfo-0:4.18.0-305.211.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-tools-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-core-0:4.18.0-305.211.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-debug-debuginfo-0:4.18.0-305.211.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-0:4.18.0-305.211.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-0:4.18.0-305.211.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
| Red Hat | kernel-tools-0:4.18.0-305.211.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.211.1.el8_4 |
…and 101 more
Timeline
- Oct 7, 2026 CVE Published
- Oct 19, 2026 CVE Updated
- Oct 19, 2026 Distribution Patch
- Oct 19, 2026 Distribution Patch
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
- Oct 19, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:77217 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2461462 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2461471 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2481922 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2482113 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2482127 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2482550 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2492095 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2492779 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502361 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502368 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502412 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502434 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2511448 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2513353 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2513477 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2517010 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2524483 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2528646 issue
…and 78 more