CVE-2026-93251ACPI: bus: Introduce acpi_bus_get_primary_device()
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: bus: Introduce acpi_bus_get_primary_device() The function used for obtaining the first "physical" device for which the given ACPI one is the ACPI companion, acpi_get_first_physical_node(), may return a stale device pointer (mostly in theory) because acpi_unbind_one() may run as a whole after dropping the ACPI device's physical_node_lock in acpi_get_first_physical_node() and before it returns. The last reference to the "physical" device may be dropped then before the pointer to it is returned to the caller. If that happens and the acpi_get_first_physical_node() caller invokes get_device() on the pointer obtained from it, which is done by the majority of its callers, a use-after-free will occur. To prepare for addressing this problem, introduce a new function for getting the first "physical" device associated with the given ACPI one (the "primary physical device") that will also reference count the device in question before returning a pointer to it. Make that new function and acpi_get_first_physical_node() share the physical node list lookup code. No intentional functional impact.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 36 days later
· 36 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 88% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < f912f88126e385f6cfcd1a28de73afb7d3943c8d
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < 50ddd82b88b1d1cc467b5df953344c1a9feec268
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < fd4f907b558721716da30acd6630191acf811b95
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < ebdd932dc24c1cf7cc31710b7730515e4e66d886
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < 5657859851abb65105220a6cdb5804926249f714
- affected 91e5687805885f9fceb60b95e950a3d3bdcf4764 – < 72530e1f72b0515a73fd88292254d04fecf03649
- affected 3.8
- unaffected < 3.8
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/f912f88126e385f6cfcd1a28de73afb7d3943c8d (opens in a new tab)
- https://git.kernel.org/stable/c/50ddd82b88b1d1cc467b5df953344c1a9feec268 (opens in a new tab)
- https://git.kernel.org/stable/c/fd4f907b558721716da30acd6630191acf811b95 (opens in a new tab)
- https://git.kernel.org/stable/c/ebdd932dc24c1cf7cc31710b7730515e4e66d886 (opens in a new tab)
- https://git.kernel.org/stable/c/5657859851abb65105220a6cdb5804926249f714 (opens in a new tab)
- https://git.kernel.org/stable/c/72530e1f72b0515a73fd88292254d04fecf03649 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86123 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-93251)Record last updated .