ip6_vti: set netns_immutable on the fallback device.
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.
CVE-2026-52909
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-52909
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "12acc977838c943636fb01e2f3087d2e4cc3b7cc",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "7f28e3948c59481f8db9c9638e204258d26b4e41",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "12c65e2c7fef507551bd7b52123598a761662c01",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "c5dbd669db5a426b3025512322e1bf2cdbe14305",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "ecf8904067dcba0dad86ece80874841e60317885",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "dcdce3bc9f08026ff3739ee7339e1bef526fc5f3",
"versionType": "git"
},
{
"status": "affected",
"version": "61220ab349485d911083d0b7990ccd3db6c63297",
"lessThan": "d289d5307762d1838aaece22c6b6fcad9e8865f9",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/ip6_vti.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.260",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.211",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.177",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/ip6_vti.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-52909
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40686 · Revision 1
- Added to Heist Feed
- Publisher date