Linux aws: In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup In… (CVE-2026-23257)
A medium severity vulnerability (CVE-2026-23257) in the Linux kernel's liquidio network driver was fixed. The issue was an off-by-one error in the cleanup loop of the setup_nic_devices() function, which caused a memory leak by skipping the failing index during cleanup. This flaw was addressed by correcting the loop to properly iterate from the current index down to zero and adjusting the index on allocation failure. The vulnerability affects certain linux-aws kernel versions prior to specific patched releases. A patch is available and should be applied to prevent potential denial of service due to memory leaks.
AI Analysis
Technical Summary
CVE-2026-23257 describes an off-by-one error in the Linux kernel liquidio driver's setup_nic_devices() function. When initialization fails, the cleanup loop incorrectly skips the failing index, causing a memory leak. The fix changes the cleanup loop to iterate correctly from the current index down to zero and adjusts the index on devlink_alloc failure to point to the last successfully allocated device. This vulnerability affects linux-aws kernel versions prior to 5.15.0-1111.118~20.04.1, 5.15.0-1116.125~20.04.1, 5.15.0-1111.121~20.04.1, and 5.15.0-185.195~20.04.1. The issue was discovered via code review and has a CVSS 3.1 score of 5.5 (medium severity) with local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
The vulnerability causes a memory leak in the Linux kernel's liquidio network driver during device initialization failure. This can lead to resource exhaustion and denial of service (availability impact). There is no impact on confidentiality or integrity. The attack requires local access with low privileges and no user interaction. The scope remains unchanged.
Mitigation Recommendations
A patch is available and should be applied by updating the linux-aws kernel to versions 5.15.0-1111.118~20.04.1 or later, 5.15.0-1116.125~20.04.1 or later, 5.15.0-1111.121~20.04.1 or later, and 5.15.0-185.195~20.04.1 or later. After applying the update, a system reboot is required to activate the fix. Follow the vendor's official update instructions and recompile any third-party kernel modules if necessary.
Linux aws: In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup In… (CVE-2026-23257)
Description
A medium severity vulnerability (CVE-2026-23257) in the Linux kernel's liquidio network driver was fixed. The issue was an off-by-one error in the cleanup loop of the setup_nic_devices() function, which caused a memory leak by skipping the failing index during cleanup. This flaw was addressed by correcting the loop to properly iterate from the current index down to zero and adjusting the index on allocation failure. The vulnerability affects certain linux-aws kernel versions prior to specific patched releases. A patch is available and should be applied to prevent potential denial of service due to memory leaks.
CVSS v3.1
Score 5.5medium
Affected software
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protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-23257 describes an off-by-one error in the Linux kernel liquidio driver's setup_nic_devices() function. When initialization fails, the cleanup loop incorrectly skips the failing index, causing a memory leak. The fix changes the cleanup loop to iterate correctly from the current index down to zero and adjusts the index on devlink_alloc failure to point to the last successfully allocated device. This vulnerability affects linux-aws kernel versions prior to 5.15.0-1111.118~20.04.1, 5.15.0-1116.125~20.04.1, 5.15.0-1111.121~20.04.1, and 5.15.0-185.195~20.04.1. The issue was discovered via code review and has a CVSS 3.1 score of 5.5 (medium severity) with local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
The vulnerability causes a memory leak in the Linux kernel's liquidio network driver during device initialization failure. This can lead to resource exhaustion and denial of service (availability impact). There is no impact on confidentiality or integrity. The attack requires local access with low privileges and no user interaction. The scope remains unchanged.
Mitigation Recommendations
A patch is available and should be applied by updating the linux-aws kernel to versions 5.15.0-1111.118~20.04.1 or later, 5.15.0-1116.125~20.04.1 or later, 5.15.0-1111.121~20.04.1 or later, and 5.15.0-185.195~20.04.1 or later. After applying the update, a system reboot is required to activate the fix. Follow the vendor's official update instructions and recompile any third-party kernel modules if necessary.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23257
- 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"]
- Cvss Version
- 3.1
Threat ID: 6a58b4e268715ace43daf1c4
Added to database: 07/16/2026, 10:39:30 UTC
Last enriched: 08/01/2026, 06:55:47 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 18
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