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In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: fs, fix UAF in flow counter release
Fix a kernel trace [1] caused by releasing an HWS action of a local flow counter in mlx5_cmd_hws_delete_fte(), where the HWS action refcount and mutex were not initialized and the counter struct could already be freed when deleting the rule.
Fix it by adding the missing initializations and adding refcount for the local flow counter struct.
[1] Kernel log: Call Trace: <TASK> dump_stack_lvl+0x34/0x48 mlx5_fs_put_hws_action.part.0.cold+0x21/0x94 [mlx5_core] mlx5_fc_put_hws_action+0x96/0xad [mlx5_core] mlx5_fs_destroy_fs_actions+0x8b/0x152 [mlx5_core] mlx5_cmd_hws_delete_fte+0x5a/0xa0 [mlx5_core] del_hw_fte+0x1ce/0x260 [mlx5_core] mlx5_del_flow_rules+0x12d/0x240 [mlx5_core] ? ttwu_queue_wakelist+0xf4/0x110 mlx5_ib_destroy_flow+0x103/0x1b0 [mlx5_ib] uverbs_free_flow+0x20/0x50 [ib_uverbs] destroy_hw_idr_uobject+0x1b/0x50 [ib_uverbs] uverbs_destroy_uobject+0x34/0x1a0 [ib_uverbs] uobj_destroy+0x3c/0x80 [ib_uverbs] ib_uverbs_run_method+0x23e/0x360 [ib_uverbs] ? uverbs_finalize_object+0x60/0x60 [ib_uverbs] ib_uverbs_cmd_verbs+0x14f/0x2c0 [ib_uverbs] ? do_tty_write+0x1a9/0x270 ? file_tty_write.constprop.0+0x98/0xc0 ? new_sync_write+0xfc/0x190 ib_uverbs_ioctl+0xd7/0x160 [ib_uverbs] __x64_sys_ioctl+0x87/0xc0 do_syscall_64+0x59/0x90
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-debug-coreUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-64k-debug-develUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-debug-modules-extraUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-debug-modules-coreUpgrade kernel-debug-modulesUpgrade kernel-64kUpgrade kernel-64k-coreUpgrade kernel-rt-modules-extraUpgrade kernel-64k-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-64k-debug-modulesUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-rt-64k-debugUpgrade kernel-rt-64k-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-64kUpgrade kernel-64k-develUpgrade kernel-rt-develUpgrade kernel-rt-64k-modules-coreUpgrade kernel-rt-64k-debug-coreUpgrade kernel-rt-debugUpgrade kernel-modules-extraUpgrade kernel-rt-64k-develUpgrade kernel-cross-headersUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-64k-debug-coreUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-64k-debug-develUpgrade kernel-rt-modules-coreUpgrade kernel-tools-libs-develUpgrade perfUpgrade kernel-coreUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdump-develUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-modulesUpgrade kernel-develUpgrade python3-perfUpgrade rvUpgrade kernel-docUpgrade kernel-64k-modules-coreUpgrade kernel-toolsUpgrade kernel-rt-debug-modules-coreUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-64k-devel-matchedUpgrade kernel-debug-develUpgrade kernel-abi-stablelistsUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-debug-develUpgrade kernel-headersUpgrade kernel-devel-matchedUpgrade libperfUpgrade kernel-modules-coreUpgrade rtlaUpgrade kernel-64k-debugUpgrade kernel-rt-64k-modulesUpgrade kernel-rt-64k-modules-extraUpgrade kernel-64k-modules-extraUpgrade kernel-debugUpgrade kernel-rtUpgrade kernel-modulesUpgrade kernel-64k-debug-modules-extraUpgrade kernel-zfcpdumpUpgrade kernel-rt-coreUpgrade kernel-64k-debug-modules-core | Dec 18, 2025 | Dec 8, 2025 |
| Oracle_linux | — | Upgrade kernel | Dec 10, 2025 | Oct 15, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Dec 10, 2025 | Oct 15, 2025 |
| Rocky_linux | — | Upgrade kernel-modules-coreUpgrade kernel-tools-libsUpgrade kernel-debug-develUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modules-coreUpgrade python3-perf-debuginfoUpgrade kernel-rt-develUpgrade kernel-zfcpdump-develUpgrade kernel-modules-extraUpgrade kernel-debug-uki-virtUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-rt-debug-modulesUpgrade kernel-modules-extra-matchedUpgrade kernel-debug-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-modulesUpgrade kernel-debuginfoUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-modulesUpgrade kernel-modulesUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debugUpgrade kernel-debug-coreUpgrade rtlaUpgrade kernel-debug-modules-coreUpgrade kernel-zfcpdumpUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rt-debugUpgrade kernel-rt-debug-modules-extraUpgrade perf-debuginfoUpgrade kernel-rtUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-tools-libs-develUpgrade kernel-zfcpdump-devel-matchedUpgrade rvUpgrade libperfUpgrade kernel-develUpgrade kernel-uki-virt-addonsUpgrade kernel-toolsUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-modules-extraUpgrade kernel-rt-coreUpgrade kernel-debuginfo-common-s390xUpgrade libperf-debuginfoUpgrade kernel-devel-matchedUpgrade kernelUpgrade python3-perfUpgrade kernel-zfcpdump-debuginfoUpgrade perf | Feb 5, 2026 | Dec 13, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-awsUpgrade linux-realtimeUpgrade linux-riscvUpgrade linuxUpgrade linux-raspiUpgrade linux-azureUpgrade linux-oracle | Oct 30, 2025 | Oct 15, 2025 |
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