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7.8
HIGH CVSS 3.1
CVE-2026-74283
tipc: require net admin for TIPCv2 netlink mutators
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: tipc: require net admin for TIPCv2 netlink mutators TIPCv2 registers mutating generic-netlink operations without admin permission flags. Generic netlink only checks CAP_NET_ADMIN when an operation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local unprivileged process can currently change TIPC state through commands such as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and bearer enable/disable. The legacy TIPC netlink API already checks netlink_net_capable(..., CAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators the equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which maps to the same namespace-aware CAP_NET_ADMIN check that netlink_net_capable() performs, so the behaviour matches the legacy path and keeps working for CAP_NET_ADMIN holders in a non-initial user namespace (containers). A QEMU/KASAN repro run as uid/gid 65534 with zero effective capabilities previously succeeded in changing the network id and node identity, setting and flushing key material, and enabling/disabling a UDP bearer. With this patch applied the same operations fail with -EPERM.

Details
INFO

Published Date :

Aug. 15, 2026, 6:22 a.m.

Last Modified :

Aug. 17, 2026, 6:19 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74283 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
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
Apply the provided patch to the Linux kernel to enforce net admin permissions for TIPCv2 netlink mutators.
  • Apply the Linux kernel patch.
  • Ensure net admin privileges for TIPCv2 operations.
  • Verify restricted access post-patch.
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-2026-74283.

URL Resource
https://git.kernel.org/stable/c/52864c6c13dcc292481eabfeb3c31a86c3ec06f2
https://git.kernel.org/stable/c/56f0a2e0a1d004e025cd031c3a801ab73959269f
https://git.kernel.org/stable/c/86b0c540e2ea397cde021eecd24145f7c16a3d4e
https://git.kernel.org/stable/c/9b937de4b3ded62a24da6e8d9d623cdb2748fa74
https://git.kernel.org/stable/c/b06fb5f78a9af0929aaa47c92d0b7bca0617fb25
https://git.kernel.org/stable/c/c9668a4adb2264625daeeabc7466b783badd4614
https://git.kernel.org/stable/c/cebaefe1aceb650d5c99a4c0e1a4dde09e211818
https://git.kernel.org/stable/c/e87dcc1a644d087de0bb6c94c6dd28c29b89597f
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74283 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-2026-74283 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-2026-74283 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74283 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:U/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': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'b06fb5f78a9af0929aaa47c92d0b7bca0617fb25', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '52864c6c13dcc292481eabfeb3c31a86c3ec06f2', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'e87dcc1a644d087de0bb6c94c6dd28c29b89597f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '9b937de4b3ded62a24da6e8d9d623cdb2748fa74', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'c9668a4adb2264625daeeabc7466b783badd4614', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'cebaefe1aceb650d5c99a4c0e1a4dde09e211818', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '56f0a2e0a1d004e025cd031c3a801ab73959269f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '86b0c540e2ea397cde021eecd24145f7c16a3d4e', 'versionType': 'git'}], 'programFiles': ['net/tipc/netlink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.19', '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/tipc/netlink.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'b06fb5f78a9af0929aaa47c92d0b7bca0617fb25', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '52864c6c13dcc292481eabfeb3c31a86c3ec06f2', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'e87dcc1a644d087de0bb6c94c6dd28c29b89597f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '9b937de4b3ded62a24da6e8d9d623cdb2748fa74', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'c9668a4adb2264625daeeabc7466b783badd4614', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'cebaefe1aceb650d5c99a4c0e1a4dde09e211818', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '56f0a2e0a1d004e025cd031c3a801ab73959269f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '86b0c540e2ea397cde021eecd24145f7c16a3d4e', 'versionType': 'git'}], 'programFiles': ['net/tipc/netlink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.19', '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/tipc/netlink.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': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'b06fb5f78a9af0929aaa47c92d0b7bca0617fb25', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '52864c6c13dcc292481eabfeb3c31a86c3ec06f2', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'e87dcc1a644d087de0bb6c94c6dd28c29b89597f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '9b937de4b3ded62a24da6e8d9d623cdb2748fa74', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'c9668a4adb2264625daeeabc7466b783badd4614', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': 'cebaefe1aceb650d5c99a4c0e1a4dde09e211818', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '56f0a2e0a1d004e025cd031c3a801ab73959269f', 'versionType': 'git'}, {'status': 'affected', 'version': '0655f6a8635b1b66f2434d5556b1044c14b1ccaf', 'lessThan': '86b0c540e2ea397cde021eecd24145f7c16a3d4e', 'versionType': 'git'}], 'programFiles': ['net/tipc/netlink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.19', '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/tipc/netlink.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: tipc: require net admin for TIPCv2 netlink mutators TIPCv2 registers mutating generic-netlink operations without admin permission flags. Generic netlink only checks CAP_NET_ADMIN when an operation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local unprivileged process can currently change TIPC state through commands such as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and bearer enable/disable. The legacy TIPC netlink API already checks netlink_net_capable(..., CAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators the equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which maps to the same namespace-aware CAP_NET_ADMIN check that netlink_net_capable() performs, so the behaviour matches the legacy path and keeps working for CAP_NET_ADMIN holders in a non-initial user namespace (containers). A QEMU/KASAN repro run as uid/gid 65534 with zero effective capabilities previously succeeded in changing the network id and node identity, setting and flushing key material, and enabling/disabling a UDP bearer. With this patch applied the same operations fail with -EPERM.
    Added Reference https://git.kernel.org/stable/c/52864c6c13dcc292481eabfeb3c31a86c3ec06f2
    Added Reference https://git.kernel.org/stable/c/56f0a2e0a1d004e025cd031c3a801ab73959269f
    Added Reference https://git.kernel.org/stable/c/86b0c540e2ea397cde021eecd24145f7c16a3d4e
    Added Reference https://git.kernel.org/stable/c/9b937de4b3ded62a24da6e8d9d623cdb2748fa74
    Added Reference https://git.kernel.org/stable/c/b06fb5f78a9af0929aaa47c92d0b7bca0617fb25
    Added Reference https://git.kernel.org/stable/c/c9668a4adb2264625daeeabc7466b783badd4614
    Added Reference https://git.kernel.org/stable/c/cebaefe1aceb650d5c99a4c0e1a4dde09e211818
    Added Reference https://git.kernel.org/stable/c/e87dcc1a644d087de0bb6c94c6dd28c29b89597f
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.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact