CVE-2025-39794: Linux kernel · ARM: tegra: Use I/O memcpy to write to IRAM
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b28c1a14accc79ead1e87bbdae53309da60be1e7 : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:35 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
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, 2026-11-05.
- Patch
- Available – fixed in b28c1a14accc79ead1e87bbdae53309da60be1e7, 387435f4833f97aabfd74434ee526e31e8a626ea, 2499b0ac908eefbb8a217aae609b7a5b5174f330 +6
Exploitation evidence
Disclosed: evidence found.
CVE published 12 Sep 2025
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 5 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 multiple Linux kernel commits identified by their hashes. Users should update to a Linux kernel version that includes these fixes to resolve the issue.
Description
A vulnerability in the Linux kernel's ARM Tegra driver was fixed by changing the method used to write to IRAM from a normal memcpy to an I/O memcpy. The issue caused kernel crashes when KASAN attempted to check memory boundaries during normal memcpy operations.
References
- git.kernel.org/stable/c/b28c1a14accc79ead1e87bbdae53309da60be1e7 (opens in a new tab)
- git.kernel.org/stable/c/75a3bdfeed2f129a2c7d9fd7779382b78e35b014 (opens in a new tab)
- git.kernel.org/stable/c/2499b0ac908eefbb8a217aae609b7a5b5174f330 (opens in a new tab)
- git.kernel.org/stable/c/387435f4833f97aabfd74434ee526e31e8a626ea (opens in a new tab)
- git.kernel.org/stable/c/46b3a7a3a36d5833f14914d1b95c69d28c6a76d6 (opens in a new tab)
- git.kernel.org/stable/c/9b0b3b5e5cae95e09bf0ae4a9bcb58d9b6d57f87 (opens in a new tab)
- git.kernel.org/stable/c/96d6605bf0561d6e568b1dd9265a0f73b5b94f51 (opens in a new tab)
- git.kernel.org/stable/c/30ef45b89a5961cdecf907ecff1ef3374d1de510 (opens in a new tab)
- git.kernel.org/stable/c/398e67e0f5ae04b29bcc9cbf342e339fe9d3f6f1 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-032379.html (opens in a new tab)