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 rtlaUpgrade kernel-debugUpgrade kernel-debug-devel-matchedUpgrade kernel-coreUpgrade rvUpgrade kernel-64k-debugUpgrade kernel-rtUpgrade kernel-rt-coreUpgrade kernel-modules-coreUpgrade kernel-headersUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-64k-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-uki-virtUpgrade kernel-64k-devel-matchedUpgrade perfUpgrade kernel-64k-debug-modules-coreUpgrade kernel-tools-libs-develUpgrade kernel-develUpgrade kernel-zfcpdump-develUpgrade kernel-64k-modules-coreUpgrade kernel-64k-debug-modules-extraUpgrade kernel-modulesUpgrade kernel-devel-matchedUpgrade kernel-abi-stablelistsUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdumpUpgrade kernel-docUpgrade kernel-rt-debug-modules-coreUpgrade kernel-64k-modules-extraUpgrade kernel-debug-develUpgrade kernel-rt-64k-modulesUpgrade libperfUpgrade kernel-zfcpdump-modules-extraUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-modules-extraUpgrade kernel-rt-debugUpgrade kernelUpgrade kernel-debug-modulesUpgrade kernel-rt-64k-debugUpgrade kernel-rt-modules-extraUpgrade kernel-64k-debug-develUpgrade kernel-cross-headersUpgrade kernel-rt-64k-develUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-rt-64k-debug-develUpgrade kernel-debug-coreUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modules-extraUpgrade kernel-rt-64k-modules-coreUpgrade kernel-64k-develUpgrade kernel-64k-coreUpgrade kernel-64kUpgrade kernel-64k-debug-coreUpgrade kernel-64k-modulesUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-develUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-modules-coreUpgrade kernel-rt-64k-debug-coreUpgrade kernel-rt-64k-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-rt-debug-modulesUpgrade kernel-tools-libsUpgrade kernel-64k-debug-modulesUpgrade kernel-rt-64k | Dec 18, 2025 | Dec 8, 2025 |
| Oracle_linux | — | Upgrade kernel | Dec 10, 2025 | Oct 15, 2025 |
| Redhat_linux | — | No solution existsUpgrade kernel-rtUpgrade kernel | Dec 10, 2025 | Oct 15, 2025 |
| Rocky_linux | — | Upgrade kernel-debuginfo-common-s390xUpgrade kernel-tools-libs-develUpgrade kernel-uki-virt-addonsUpgrade perfUpgrade libperfUpgrade rvUpgrade python3-perfUpgrade kernelUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-develUpgrade kernel-toolsUpgrade kernel-devel-matchedUpgrade kernel-zfcpdump-debuginfoUpgrade libperf-debuginfoUpgrade kernel-rt-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-modules-extraUpgrade kernel-debug-devel-matchedUpgrade kernel-rtUpgrade perf-debuginfoUpgrade kernel-zfcpdump-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-tools-debuginfoUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modulesUpgrade kernel-zfcpdump-modules-extraUpgrade python3-perf-debuginfoUpgrade kernel-zfcpdump-develUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debug-develUpgrade kernel-modules-extra-matchedUpgrade kernel-debug-debuginfoUpgrade kernel-rt-debug-modulesUpgrade kernel-zfcpdumpUpgrade kernel-rt-debug-debuginfoUpgrade kernel-debug-coreUpgrade kernel-debugUpgrade rtlaUpgrade kernel-rt-debuginfoUpgrade kernel-uki-virtUpgrade kernel-debug-develUpgrade kernel-modules-coreUpgrade kernel-modulesUpgrade kernel-tools-libsUpgrade kernel-rt-develUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-modules-extraUpgrade kernel-rt-modules-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debugUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-core | Feb 5, 2026 | Dec 13, 2025 |
| Ubuntu | — | Upgrade linux-azureUpgrade linux-oracleUpgrade linuxUpgrade linux-raspiUpgrade linux-riscvUpgrade linux-realtimeUpgrade linux-gcpUpgrade linux-aws | Oct 30, 2025 | Oct 15, 2025 |
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