CVE-2026-68313

Task starvation via unchecked dump callback error

Published Aug 10, 2026 · Updated Aug 10, 2026

Denial of service in Linux kernel TIPC allows local users to hang tasks by triggering an error during a compatibility netlink dump. The __tipc_nl_compat_dumpit loop continues while len is nonzero without checking whether cmd->dumpit returned a negative error. Low-privileged local access is required; the resulting infinite loop retains genl_mutex and leaves other tasks waiting on that lock stuck in D state.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel TIPC allows local users to hang tasks by triggering an error during a compatibility netlink dump. The __tipc_nl_compat_dumpit loop continues while len is nonzero without checking whether cmd->dumpit returned a negative error. Low-privileged local access is required; the resulting infinite loop retains genl_mutex and leaves other tasks waiting on that lock stuck in D state.

The record

CVE
CVE-2026-68313
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=4.0
  2. Affected versionversion=d0796d1ef63deb38147729664691ba3090930b26 <1ab78af2140189b735b8d3b889b0284128cb2013
  3. Affected versionversion=d0796d1ef63deb38147729664691ba3090930b26 <22f8aa35964e8f2ab026578f45befc9605fd1b28
  4. Affected versionversion=d0796d1ef63deb38147729664691ba3090930b26 <b8f3b8efa5f99081b14de1a7ffa68a81bf01bd48
  5. Affected versionversion=d0796d1ef63deb38147729664691ba3090930b26 <e740e90ca8e7f70d9eac1aa31a8b3e0e4d32b2ef
  6. Affected versionversion=d0796d1ef63deb38147729664691ba3090930b26 <f9c669d9f4cac832fe31193cdbc24c6a9d99398b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.0; version=d0796d1ef63deb38147729664691ba3090930b26 <1ab78af2140189b735b8d3b889b0284128cb2013; version=d0796d1ef63deb38147729664691ba3090930b26 <22f8aa35964e8f2ab026578f45befc9605fd1b28; version=d0796d1ef63deb38147729664691ba3090930b26 <b8f3b8efa5f99081b14de1a7ffa68a81bf01bd48; version=d0796d1ef63deb38147729664691ba3090930b26 <e740e90ca8e7f70d9eac1aa31a8b3e0e4d32b2ef; version=d0796d1ef63deb38147729664691ba3090930b26 <f9c669d9f4cac832fe31193cdbc24c6a9d99398b

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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