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 rvUpgrade kernel-develUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-develUpgrade kernel-abi-stablelistsUpgrade kernel-64k-debugUpgrade kernel-64k-modules-coreUpgrade python3-perfUpgrade kernel-uki-virtUpgrade kernel-debugUpgrade kernel-zfcpdumpUpgrade kernel-rt-coreUpgrade kernel-rt-debug-develUpgrade kernel-rt-64k-modules-extraUpgrade kernel-64k-debug-modules-extraUpgrade kernel-modulesUpgrade kernel-rtUpgrade kernel-debug-develUpgrade kernel-64k-devel-matchedUpgrade kernel-64k-debug-modules-coreUpgrade kernel-devel-matchedUpgrade kernel-modules-coreUpgrade kernel-64k-modules-extraUpgrade libperfUpgrade perfUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-debug-devel-matchedUpgrade rtlaUpgrade kernel-docUpgrade kernel-rt-64k-modulesUpgrade kernel-coreUpgrade kernel-toolsUpgrade kernel-rt-debug-modules-coreUpgrade kernel-tools-libs-develUpgrade kernel-headersUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-zfcpdump-coreUpgrade kernel-64k-debug-coreUpgrade kernel-64kUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modules-extraUpgrade kernel-rt-64k-debug-develUpgrade kernel-64k-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-rt-64k-debugUpgrade kernel-rt-64k-coreUpgrade kernel-rt-64kUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debug-uki-virtUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-rt-64k-develUpgrade kernel-rt-develUpgrade kernelUpgrade kernel-64k-coreUpgrade kernel-rt-64k-modules-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-zfcpdump-modulesUpgrade kernel-modules-extraUpgrade kernel-cross-headersUpgrade kernel-rt-debugUpgrade kernel-64k-develUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-debug-modulesUpgrade kernel-rt-64k-debug-coreUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-modules-coreUpgrade kernel-debug-coreUpgrade kernel-rt-modules-extraUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-64k-debug-develUpgrade kernel-64k-debug-modulesUpgrade kernel-tools-libs | Dec 18, 2025 | Dec 8, 2025 |
| Oracle_linux | — | Upgrade kernel | Dec 10, 2025 | Oct 15, 2025 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Dec 10, 2025 | Oct 15, 2025 |
| Rocky_linux | — | Upgrade kernel-zfcpdump-modules-extraUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-coreUpgrade python3-perf-debuginfoUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-modulesUpgrade rtlaUpgrade kernel-debug-modules-coreUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rt-debugUpgrade kernel-debugUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debug-coreUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debug-modules-extraUpgrade kernel-debug-develUpgrade kernel-debug-modules-extraUpgrade kernel-modulesUpgrade kernel-tools-debuginfoUpgrade kernel-debug-debuginfoUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-develUpgrade kernel-rt-debug-develUpgrade kernel-rt-modules-coreUpgrade kernel-coreUpgrade kernel-zfcpdumpUpgrade kernel-modules-coreUpgrade kernel-modules-extra-matchedUpgrade kernel-modules-extraUpgrade kernel-tools-libsUpgrade kernel-rt-modulesUpgrade kernel-rt-modules-extraUpgrade perf-debuginfoUpgrade kernelUpgrade kernel-debug-devel-matchedUpgrade kernel-tools-libs-develUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-zfcpdump-debuginfoUpgrade perfUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-devel-matchedUpgrade kernel-rtUpgrade kernel-rt-coreUpgrade kernel-debuginfo-common-s390xUpgrade libperfUpgrade kernel-uki-virt-addonsUpgrade rvUpgrade python3-perfUpgrade libperf-debuginfoUpgrade kernel-develUpgrade kernel-toolsUpgrade kernel-zfcpdump-core | Feb 5, 2026 | Dec 13, 2025 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-realtimeUpgrade linux-gcpUpgrade linux-riscvUpgrade linux-raspiUpgrade linux-azureUpgrade linuxUpgrade linux-oracle | Oct 30, 2025 | Oct 15, 2025 |
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