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 kernel6.12-modules-extraUpgrade kernel-libbpfUpgrade kernel-libbpf-debuginfoUpgrade kernel6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-debuginfo-common-x86_64Upgrade python3-perf6.12Upgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernel-livepatch-6.12.23-29.97Upgrade perf6.12-debuginfoUpgrade kernel-libbpf-staticUpgrade perf6.12Upgrade kernel-toolsUpgrade kernel-modules-extra-commonUpgrade kernel-develUpgrade bpftoolUpgrade python3-perf6.12-debuginfoUpgrade kernel-libbpf-develUpgrade kernel6.12-debuginfo | Apr 30, 2025 | Feb 27, 2025 |
| Debian | — | Upgrade linux | May 15, 2025 | Feb 27, 2025 |
| Suse | — | Upgrade kernel-64kb-develUpgrade kernel-default-vdsoUpgrade kernel-develUpgrade kernel-defaultUpgrade kernel-symsUpgrade kernel-64kb-extraUpgrade kernel-zfcpdumpUpgrade reiserfs-kmp-defaultUpgrade kernel-sourceUpgrade kernel-devel-azureUpgrade kernel-obs-qaUpgrade kernel-azure-develUpgrade kernel-macrosUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azure-vdsoUpgrade kernel-obs-buildUpgrade kernel-kvmsmall-develUpgrade kernel-kvmsmallUpgrade kernel-default-extraUpgrade kernel-source-azureUpgrade kernel-64kbUpgrade kernel-azureUpgrade kernel-default-livepatchUpgrade kernel-docs-htmlUpgrade kernel-azure-extraUpgrade kernel-source-vanillaUpgrade kernel-docsUpgrade kernel-default-devel | 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 |
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