CVE-2025-38676: Linux kernel · iommu/amd: Avoid stack buffer overflow from kernel cmdline
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in a732502bf3bbe859613b6d7b2b0313b11f0474ac : update Linux kernel when convenient.
Data as of 5 Nov 2026, 21:34 UTC
Rated by Threat Radar · 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 a732502bf3bbe859613b6d7b2b0313b11f0474ac, 8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdec, 736db11c86f03e717fc4bf771d05efdf10d23acb +9
Exploitation evidence
Disclosed: evidence found.
CVE published 26 Aug 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
|
| LinuxLinux | Affected
| Fixed in– |
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Avoid stack buffer overflow from kernel cmdline While the kernel command line is considered trusted in most environments, avoid writing 1 byte past the end of "acpiid" if the "str" argument is maximum length.
References
- git.kernel.org/stable/c/a732502bf3bbe859613b6d7b2b0313b11f0474ac (opens in a new tab)
- git.kernel.org/stable/c/0ad8509b468fa1058f4f400a1829f29e4ccc4de8 (opens in a new tab)
- git.kernel.org/stable/c/9ff52d3af0ef286535749e14e3fe9eceb39a8349 (opens in a new tab)
- git.kernel.org/stable/c/8f80c633cba144f721d38d9380f23d23ab7db10e (opens in a new tab)
- git.kernel.org/stable/c/4bdb0f78bddbfa77d3ab458a21dd9cec495d317a (opens in a new tab)
- git.kernel.org/stable/c/736db11c86f03e717fc4bf771d05efdf10d23acb (opens in a new tab)
- git.kernel.org/stable/c/8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdec (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)