High severity7.8NVD Advisory· Published Jun 19, 2026· Updated Jul 8, 2026
CVE-2026-52909
CVE-2026-52909
Description
In the Linux kernel, the following vulnerability has been resolved:
ip6_vti: set netns_immutable on the fallback device.
john1988 and Noam Rathaus reported that vti6_init_net() does not set the netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0).
Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) correctly set this flag during their fallback device initialization to prevent them from being moved to another network namespace.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
35cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.15,<5.10.260
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords25 versionspkg:apk/chainguard/linux-aws-6.12pkg:apk/chainguard/linux-azure-6.12pkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.12pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-gcp-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-6.12pkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-melangepkg:apk/chainguard/linux-vmware-6.12pkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
< 6.12.96-r0+ 24 more
- (no CPE)range: < 6.12.96-r0
- (no CPE)range: < 6.12.96-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.96-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.96-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.12.96-r0
- (no CPE)range: >= 3.15.0, < 5.10.260
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1.160000.2.17
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7ccnvdPatch
- git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01nvdPatch
- git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41nvdPatch
- git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305nvdPatch
- git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9nvdPatch
- git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3nvdPatch
- git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885nvdPatch
- git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3nvdPatch
News mentions
1- Linux Kernel: Three CVEs Disclosed June 19 — BPF, VTI, and RDMA FixesVypr Intelligence · Jun 19, 2026