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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-develUpgrade kernel-toolsUpgrade kernel6.12-debuginfoUpgrade kernel-libbpf-staticUpgrade perf6.12Upgrade kernel-libbpf-develUpgrade python3-perf6.12-debuginfoUpgrade bpftoolUpgrade kernel-modules-extra-commonUpgrade kernel-libbpf-debuginfoUpgrade kernel6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-libbpfUpgrade bpftool-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel-livepatch-6.12.23-29.97Upgrade kernel-tools-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel6.12-modules-extra | 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-develUpgrade kernel-develUpgrade kernel-defaultUpgrade kernel-default-vdsoUpgrade kernel-symsUpgrade reiserfs-kmp-defaultUpgrade kernel-obs-qaUpgrade kernel-64kb-extraUpgrade kernel-azure-develUpgrade kernel-azureUpgrade kernel-docs-htmlUpgrade kernel-azure-vdsoUpgrade kernel-obs-buildUpgrade kernel-kvmsmall-vdsoUpgrade kernel-kvmsmall-develUpgrade kernel-kvmsmallUpgrade kernel-default-extraUpgrade kernel-64kbUpgrade kernel-macrosUpgrade kernel-source-vanillaUpgrade kernel-docsUpgrade kernel-default-develUpgrade kernel-default-livepatchUpgrade kernel-azure-extraUpgrade kernel-source-azure | 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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