Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: use list_del_rcu for netlink hooks…
A vulnerability in the Linux kernel's netfilter nf_tables subsystem was resolved by changing the list removal function to list_del_rcu() for certain netlink hooks. This fix addresses a concurrency issue where the affected lists could be traversed by concurrent dumpers, potentially leading to unsafe behavior. The vulnerability affects multiple Ubuntu Linux kernel versions prior to 7.0.0-28.28~24.04.1 and related builds.
AI Analysis
Technical Summary
The Linux kernel netfilter nf_tables component had a vulnerability due to improper list removal in the netlink hooks nft_netdev_unregister_hooks and __nft_unregister_flowtable_net_hooks. These hooks previously did not use list_del_rcu(), which is necessary because the lists can be concurrently accessed by dumpers. The fix involved adding a new helper function and consistently using list_del_rcu() to safely remove list entries, preventing potential concurrency issues.
Potential Impact
The vulnerability could lead to unsafe concurrent access to kernel data structures related to netfilter nf_tables, which may cause instability or other unintended behavior in the kernel. The CVSS vector indicates a local attack vector with low complexity and partial privileges required, with a high impact on availability. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in Linux kernel versions 7.0.0-28.28~24.04.1 and later, as well as the related patched builds. Users should upgrade to these fixed kernel versions to remediate the vulnerability. Since this is not a cloud service, manual patching is required. Patch status is confirmed by the affectedVersions data indicating fixed versions at or above 7.0.0-28.28~24.04.1.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: use list_del_rcu for netlink hooks…
Description
A vulnerability in the Linux kernel's netfilter nf_tables subsystem was resolved by changing the list removal function to list_del_rcu() for certain netlink hooks. This fix addresses a concurrency issue where the affected lists could be traversed by concurrent dumpers, potentially leading to unsafe behavior. The vulnerability affects multiple Ubuntu Linux kernel versions prior to 7.0.0-28.28~24.04.1 and related builds.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.2?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]+cvm1.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.3?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email 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protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel netfilter nf_tables component had a vulnerability due to improper list removal in the netlink hooks nft_netdev_unregister_hooks and __nft_unregister_flowtable_net_hooks. These hooks previously did not use list_del_rcu(), which is necessary because the lists can be concurrently accessed by dumpers. The fix involved adding a new helper function and consistently using list_del_rcu() to safely remove list entries, preventing potential concurrency issues.
Potential Impact
The vulnerability could lead to unsafe concurrent access to kernel data structures related to netfilter nf_tables, which may cause instability or other unintended behavior in the kernel. The CVSS vector indicates a local attack vector with low complexity and partial privileges required, with a high impact on availability. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in Linux kernel versions 7.0.0-28.28~24.04.1 and later, as well as the related patched builds. Users should upgrade to these fixed kernel versions to remediate the vulnerability. Since this is not a cloud service, manual patching is required. Patch status is confirmed by the affectedVersions data indicating fixed versions at or above 7.0.0-28.28~24.04.1.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-46324
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates: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"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a5a018591ae9bcd3f804901
Added to database: 07/17/2026, 10:18:45 UTC
Last enriched: 07/30/2026, 15:09:53 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 3
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