CVE-2026-74283

Unauthorized TIPC state changes via ungated mutators

Published Aug 15, 2026 · Updated Aug 15, 2026

Improper authorization in the Linux kernel TIPC component allows local users to alter TIPC state through TIPCv2 generic netlink. TIPCv2 mutating operations omit generic-netlink admin-permission flags, so the kernel performs no CAP_NET_ADMIN check before accepting network, key, and bearer changes. Any local process with no effective capabilities can change node identity, key material, or UDP bearer state, disrupting or compromising TIPC communications.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in the Linux kernel TIPC component allows local users to alter TIPC state through TIPCv2 generic netlink. TIPCv2 mutating operations omit generic-netlink admin-permission flags, so the kernel performs no CAP_NET_ADMIN check before accepting network, key, and bearer changes. Any local process with no effective capabilities can change node identity, key material, or UDP bearer state, disrupting or compromising TIPC communications.

The record

CVE
CVE-2026-74283
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-266
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <52864c6c13dcc292481eabfeb3c31a86c3ec06f2
  2. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <56f0a2e0a1d004e025cd031c3a801ab73959269f
  3. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <86b0c540e2ea397cde021eecd24145f7c16a3d4e
  4. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <9b937de4b3ded62a24da6e8d9d623cdb2748fa74
  5. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <b06fb5f78a9af0929aaa47c92d0b7bca0617fb25
  6. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <c9668a4adb2264625daeeabc7466b783badd4614
  7. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <cebaefe1aceb650d5c99a4c0e1a4dde09e211818
  8. Affected versionversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <e87dcc1a644d087de0bb6c94c6dd28c29b89597f
  9. Affected versionversion=3.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <52864c6c13dcc292481eabfeb3c31a86c3ec06f2; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <56f0a2e0a1d004e025cd031c3a801ab73959269f; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <86b0c540e2ea397cde021eecd24145f7c16a3d4e; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <9b937de4b3ded62a24da6e8d9d623cdb2748fa74; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <b06fb5f78a9af0929aaa47c92d0b7bca0617fb25; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <c9668a4adb2264625daeeabc7466b783badd4614; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <cebaefe1aceb650d5c99a4c0e1a4dde09e211818; version=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <e87dcc1a644d087de0bb6c94c6dd28c29b89597f; version=3.19

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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