CVE-2026-93251: Linux kernel · ACPI: bus: Introduce acpi_bus_get_primary_device()
Source GCVE Database
Not known to be exploited · fixed in fd4f907b558721716da30acd6630191acf811b95 : patch Linux kernel soon.
Data as of 30 Oct 2026, 18:03 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in fd4f907b558721716da30acd6630191acf811b95, f912f88126e385f6cfcd1a28de73afb7d3943c8d, ebdd932dc24c1cf7cc31710b7730515e4e66d886 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 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 30 Oct 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 new function acpi_bus_get_primary_device() was introduced to safely obtain the primary physical device with proper reference counting, mitigating the use-after-free vulnerability. Users should update to Linux kernel versions that include this fix once available.
Description
A use-after-free vulnerability was identified in the Linux kernel's ACPI bus subsystem related to obtaining the first physical device associated with an ACPI device. The existing function acpi_get_first_physical_node() could return a stale device pointer due to a race condition involving device unbinding. This could lead to a use-after-free if the returned pointer is used. A new function, acpi_bus_get_primary_device(), was introduced to safely obtain the primary physical device with proper reference counting, preventing this issue. No intentional functional impact was reported.
References
- nvd.nist.gov/vuln/detail/CVE-2026-93251 (opens in a new tab)
- git.kernel.org/stable/c/50ddd82b88b1d1cc467b5df953344c1a9feec268 (opens in a new tab)
- git.kernel.org/stable/c/5657859851abb65105220a6cdb5804926249f714 (opens in a new tab)
- git.kernel.org/stable/c/72530e1f72b0515a73fd88292254d04fecf03649 (opens in a new tab)
- git.kernel.org/stable/c/ebdd932dc24c1cf7cc31710b7730515e4e66d886 (opens in a new tab)
- git.kernel.org/stable/c/f912f88126e385f6cfcd1a28de73afb7d3943c8d (opens in a new tab)
- git.kernel.org/stable/c/fd4f907b558721716da30acd6630191acf811b95 (opens in a new tab)