Linux aws: In the Linux kernel, the following vulnerability has been resolved: PCI: use generic driver_override infrastructure When a driver is probed through… (CVE-2026-53120)
A use-after-free vulnerability in the Linux kernel's PCI subsystem was resolved by adopting the generic driver_override infrastructure to ensure proper locking. The flaw occurred when the bus' match() callback was called without holding the device lock, leading to unsafe access of the driver_override field. This vulnerability affects multiple linux-aws kernel versions prior to 7.0.0-28.28 and related releases. The vulnerability has a CVSS score of 7.8 and impacts confidentiality, integrity, and availability. A patch is available and should be applied to mitigate the issue.
AI Analysis
Technical Summary
CVE-2026-53120 is a use-after-free vulnerability in the Linux kernel's PCI subsystem. When a driver is probed through __driver_attach(), the bus' match() callback is invoked without holding the device lock, causing unsafe access to the driver_override field and leading to a potential use-after-free condition. The issue was fixed by switching to the driver-core driver_override infrastructure, which manages proper locking internally. This vulnerability affects linux-aws kernel versions prior to 7.0.0-28.28 and related builds. The vulnerability has a CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating a high impact on confidentiality, integrity, and availability. The vendor has released patches to address the issue.
Potential Impact
The vulnerability allows a local attacker with low privileges to exploit a use-after-free condition in the PCI subsystem, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. The CVSS score of 7.8 reflects the high severity of the flaw. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available and should be applied promptly. The vendor advisory from Ubuntu confirms that updating to linux-aws kernel versions 7.0.0-28.28 or later resolves this issue. After applying the update, a system reboot is required. Due to an ABI change, recompilation and reinstallation of third-party kernel modules may be necessary. Follow the vendor's update instructions carefully.
Linux aws: In the Linux kernel, the following vulnerability has been resolved: PCI: use generic driver_override infrastructure When a driver is probed through… (CVE-2026-53120)
Description
A use-after-free vulnerability in the Linux kernel's PCI subsystem was resolved by adopting the generic driver_override infrastructure to ensure proper locking. The flaw occurred when the bus' match() callback was called without holding the device lock, leading to unsafe access of the driver_override field. This vulnerability affects multiple linux-aws kernel versions prior to 7.0.0-28.28 and related releases. The vulnerability has a CVSS score of 7.8 and impacts confidentiality, integrity, and availability. A patch is available and should be applied to mitigate the issue.
CVSS v3.1
Score 7.8high
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-53120 is a use-after-free vulnerability in the Linux kernel's PCI subsystem. When a driver is probed through __driver_attach(), the bus' match() callback is invoked without holding the device lock, causing unsafe access to the driver_override field and leading to a potential use-after-free condition. The issue was fixed by switching to the driver-core driver_override infrastructure, which manages proper locking internally. This vulnerability affects linux-aws kernel versions prior to 7.0.0-28.28 and related builds. The vulnerability has a CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating a high impact on confidentiality, integrity, and availability. The vendor has released patches to address the issue.
Potential Impact
The vulnerability allows a local attacker with low privileges to exploit a use-after-free condition in the PCI subsystem, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. The CVSS score of 7.8 reflects the high severity of the flaw. There are no known exploits in the wild at this time.
Mitigation Recommendations
A patch is available and should be applied promptly. The vendor advisory from Ubuntu confirms that updating to linux-aws kernel versions 7.0.0-28.28 or later resolves this issue. After applying the update, a system reboot is required. Due to an ABI change, recompilation and reinstallation of third-party kernel modules may be necessary. Follow the vendor's update instructions carefully.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53120
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a5a012191ae9bcd3f800005
Added to database: 07/17/2026, 10:17:05 UTC
Last enriched: 09/07/2026, 22:41:10 UTC
Last updated: 09/14/2026, 22:01:35 UTC
Views: 19
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