8.8
HIGH
CVSS 3.1
CVE-2026-72055
net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate vti6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
Details
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Require CAP_NET_ADMIN in the device's network namespace for changelink operations.
- Gate vti6_changelink() on rtnl_dev_link_net_capable().
- Ensure CAP_NET_ADMIN is checked in the correct network namespace.
- Update the Linux kernel to include these security checks.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72055.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72055 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72055
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72055 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72055 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f5254e7766b4ac02b66b2ccef896cd278503cb11', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'ef897249dc957089e6f7f11ceea699e093ad51bd', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'c64b9ae7eb97e81d54b792910a3aeafd92566c79', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': '0b2f9c908f930ec4be17d389723f9a202d6a883c', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f97e93ebf2f9b8ef3b87f7a9371255e84d151587', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'e2ac3b242c37dff323a964962e43854f4b1a2b79', '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': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ipv6/ip6_vti.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f5254e7766b4ac02b66b2ccef896cd278503cb11', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'ef897249dc957089e6f7f11ceea699e093ad51bd', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'c64b9ae7eb97e81d54b792910a3aeafd92566c79', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': '0b2f9c908f930ec4be17d389723f9a202d6a883c', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f97e93ebf2f9b8ef3b87f7a9371255e84d151587', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'e2ac3b242c37dff323a964962e43854f4b1a2b79', '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': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ipv6/ip6_vti.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f5254e7766b4ac02b66b2ccef896cd278503cb11', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'ef897249dc957089e6f7f11ceea699e093ad51bd', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'c64b9ae7eb97e81d54b792910a3aeafd92566c79', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': '0b2f9c908f930ec4be17d389723f9a202d6a883c', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'f97e93ebf2f9b8ef3b87f7a9371255e84d151587', 'versionType': 'git'}, {'status': 'affected', 'version': '61220ab349485d911083d0b7990ccd3db6c63297', 'lessThan': 'e2ac3b242c37dff323a964962e43854f4b1a2b79', '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': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ipv6/ip6_vti.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate vti6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed. Added Reference https://git.kernel.org/stable/c/0b2f9c908f930ec4be17d389723f9a202d6a883c Added Reference https://git.kernel.org/stable/c/b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf Added Reference https://git.kernel.org/stable/c/c64b9ae7eb97e81d54b792910a3aeafd92566c79 Added Reference https://git.kernel.org/stable/c/e2ac3b242c37dff323a964962e43854f4b1a2b79 Added Reference https://git.kernel.org/stable/c/ef897249dc957089e6f7f11ceea699e093ad51bd Added Reference https://git.kernel.org/stable/c/f5254e7766b4ac02b66b2ccef896cd278503cb11 Added Reference https://git.kernel.org/stable/c/f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba Added Reference https://git.kernel.org/stable/c/f97e93ebf2f9b8ef3b87f7a9371255e84d151587
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.