CVE-2026-74585: Linux kernel · thunderbolt: Bound the DROM dual link port number before indexing sw->ports
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f28066057134aa9294caa597b670daf505ad9dce : patch Linux kernel soon.
Data as of 6 Nov 2026, 17:55 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f28066057134aa9294caa597b670daf505ad9dce, f32c3a9a77cfb50934a60b05d5407649af062535, d6764992f17b23d91ff93ce905ab53c2aa7191f0 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 22 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel. Users and administrators should update to a fixed kernel version containing the patches identified by the provided commit hashes. No additional mitigation steps are indicated by the vendor advisory.
Description
A vulnerability in the Linux kernel's Thunderbolt driver allows a malicious or malformed device to cause an out-of-bounds access by setting a dual_link_port_nr value beyond the allowed range. This occurs because the dual_link_port_nr field is used to index an array without proper bounds checking, potentially leading to invalid pointer dereferences. The issue has been fixed by adding a check to reject port entries with dual_link_port_nr exceeding the maximum allowed port number.
References
- git.kernel.org/stable/c/6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c (opens in a new tab)
- git.kernel.org/stable/c/3d3c212b70633332ab71672aa2bc6af257d2ec83 (opens in a new tab)
- git.kernel.org/stable/c/b98e1e28bd95b0fa33164eec1e763d26c7058b39 (opens in a new tab)
- git.kernel.org/stable/c/50f0c8dd8c3390f851cfb97ca13116f9ee6469d1 (opens in a new tab)
- git.kernel.org/stable/c/f28066057134aa9294caa597b670daf505ad9dce (opens in a new tab)
- git.kernel.org/stable/c/40d2ffb74094cf36edbe05855566a4c58b6ce808 (opens in a new tab)
- git.kernel.org/stable/c/f32c3a9a77cfb50934a60b05d5407649af062535 (opens in a new tab)
- git.kernel.org/stable/c/d6764992f17b23d91ff93ce905ab53c2aa7191f0 (opens in a new tab)