In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: HWS, change error flow on matcher disconnect
Currently, when firmware failure occurs during matcher disconnect flow, the error flow of the function reconnects the matcher back and returns an error, which continues running the calling function and eventually frees the matcher that is being disconnected. This leads to a case where we have a freed matcher on the matchers list, which in turn leads to use-after-free and eventual crash.
This patch fixes that by not trying to reconnect the matcher back when some FW command fails during disconnect.
Note that we're dealing here with FW error. We can't overcome this problem. This might lead to bad steering state (e.g. wrong connection between matchers), and will also lead to resource leakage, as it is the case with any other error handling during resource destruction.
However, the goal here is to allow the driver to continue and not crash the machine with use-after-free error.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perf6.12Upgrade kernel-toolsUpgrade kernel-develUpgrade bpftoolUpgrade python3-perf6.12-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-modules-extra-commonUpgrade kernel6.12-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-headersUpgrade kernel6.12-debuginfo-common-x86_64Upgrade python3-perf6.12Upgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-6.12.23-29.97Upgrade kernel6.12-modules-extraUpgrade kernel6.12Upgrade kernel-libbpf-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-libbpfUpgrade perf6.12-debuginfoUpgrade bpftool-debuginfo | Apr 30, 2025 | Feb 27, 2025 |
| Debian | — | Upgrade linux | May 15, 2025 | Feb 27, 2025 |
| Suse | — | Upgrade kernel-zfcpdumpUpgrade kernel-sourceUpgrade kernel-devel-azureUpgrade kernel-64kb-extraUpgrade kernel-defaultUpgrade kernel-64kb-develUpgrade kernel-develUpgrade kernel-symsUpgrade kernel-default-vdsoUpgrade kernel-obs-qaUpgrade reiserfs-kmp-defaultUpgrade kernel-default-livepatchUpgrade kernel-source-azureUpgrade kernel-docs-htmlUpgrade kernel-azure-extraUpgrade kernel-default-extraUpgrade kernel-docsUpgrade kernel-macrosUpgrade kernel-kvmsmall-develUpgrade kernel-obs-buildUpgrade kernel-azure-vdsoUpgrade kernel-kvmsmallUpgrade kernel-azureUpgrade kernel-azure-develUpgrade kernel-kvmsmall-vdsoUpgrade kernel-source-vanillaUpgrade kernel-default-develUpgrade kernel-64kb | Dec 5, 2025 | Dec 5, 2025 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Feb 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 17, 2026 | Feb 27, 2025 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub