VulnerabilityPublished 18 Oct 2026

CVE-2026-98692: Linux kernel · thunderbolt: Make the DP tunnel activation callback mandatory

Source GCVE Database

Authoritative record:CVE-2026-98692· Low

Not known to be exploited : upgrade to 47d60ea801fc333a10c576691eca2e7840b02d3d or 12f5d8b85a66a0ac08d082517d92ce136f8c0d42 when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 47d60ea801fc333a10c576691eca2e7840b02d3d, 12f5d8b85a66a0ac08d082517d92ce136f8c0d42

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-j976-jwv6-gqm2

What to do

Upgrade Linux kernel to 47d60ea801fc333a10c576691eca2e7840b02d3d or 12f5d8b85a66a0ac08d082517d92ce136f8c0d42.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ d6d458d42e1e1544a18f37f1d5c840e00d5261b9, < 47d60ea801fc333a10c576691eca2e7840b02d3d	Fixed in 47d60ea801fc333a10c576691eca2e7840b02d3d
LinuxLinux	Affected ≥ d6d458d42e1e1544a18f37f1d5c840e00d5261b9, < 12f5d8b85a66a0ac08d082517d92ce136f8c0d42	Fixed in 12f5d8b85a66a0ac08d082517d92ce136f8c0d42
LinuxLinux	Affected =6.14	Fixed in–

AI-suggested

An official fix has been applied to the Linux kernel to make the DP tunnel activation callback mandatory and remove the synchronous capability read path. Users should update to the fixed Linux kernel version once available. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's Thunderbolt driver related to DisplayPort (DP) tunnel activation callback handling has been resolved. The issue involved a missing mandatory callback in the tb_tunnel_alloc_dp() function, causing a reference leak for every tunnel without a callback. This flaw also caused hibernation restore to block for up to 12 seconds. The fix enforces the callback requirement and removes the synchronous path, improving stability and resource management.

Impact

The vulnerability caused a resource leak (tunnel reference leak) in the Thunderbolt DP tunnel handling, which could degrade system stability or performance over time. It also caused hibernation restore to block for up to 12 seconds, impacting user experience. There is no indication of direct security compromise or exploitation in the wild.

Summary

The Linux kernel Thunderbolt driver had a vulnerability where the DP tunnel activation callback was optional in tb_tunnel_alloc_dp(). Without the callback, tb_dp_dprx_start() read DPRX capabilities synchronously and never queued the work, but still took a tunnel reference that was only released by asynchronous work or cancellation. This caused a reference leak for tunnels without a callback, specifically those from tb_tunnel_discover_dp() used during hibernation restore. The fix makes the callback mandatory, removes the synchronous read path, and ensures DPRX capabilities are always read asynchronously, preventing reference leaks and reducing hibernation restore delays.

References

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