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