Deadlock in Linux kernel - CVE-2026-43147
Published: May 7, 2026
Vulnerability identifier: #VU130588
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43147
CWE-ID: CWE-833
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a deadlock in the SR-IOV handling logic when writing to sysfs entries to disable virtual functions and remove a PCI device. A local user can write crafted values to the sriov_numvfs and remove sysfs attributes to cause a denial of service.
The issue is triggered by recursive acquisition of pci_rescan_remove_lock during device removal.
How to mitigate CVE-2026-43147
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59
- https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a
- https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f
- https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8
- https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252
- https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732
- https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7
- https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05