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In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Fix implicit ODP use after free
Prevent double queueing of implicit ODP mr destroy work by using __xa_cmpxchg() to make sure this is the only time we are destroying this specific mr.
Without this change, we could try to invalidate this mr twice, which in turn could result in queuing a MR work destroy twice, and eventually the second work could execute after the MR was freed due to the first work, causing a user after free and trace below.
refcount_t: underflow; use-after-free. WARNING: CPU: 2 PID: 12178 at lib/refcount.c:28 refcount_warn_saturate+0x12b/0x130 Modules linked in: bonding ib_ipoib vfio_pci ip_gre geneve nf_tables ip6_gre gre ip6_tunnel tunnel6 ipip tunnel4 ib_umad rdma_ucm mlx5_vfio_pci vfio_pci_core vfio_iommu_type1 mlx5_ib vfio ib_uverbs mlx5_core iptable_raw openvswitch nsh rpcrdma ib_iser libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_cm ib_core xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_nat nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay zram zsmalloc fuse [last unloaded: ib_uverbs] CPU: 2 PID: 12178 Comm: kworker/u20:5 Not tainted 6.5.0-rc1_net_next_mlx5_58c644e #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Workqueue: events_unbound free_implicit_child_mr_work [mlx5_ib] RIP: 0010:refcount_warn_saturate+0x12b/0x130 Code: 48 c7 c7 38 95 2a 82 c6 05 bc c6 fe 00 01 e8 0c 66 aa ff 0f 0b 5b c3 48 c7 c7 e0 94 2a 82 c6 05 a7 c6 fe 00 01 e8 f5 65 aa ff <0f> 0b 5b c3 90 8b 07 3d 00 00 00 c0 74 12 83 f8 01 74 13 8d 50 ff RSP: 0018:ffff8881008e3e40 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027 RDX: ffff88852c91b5c8 RSI: 0000000000000001 RDI: ffff88852c91b5c0 RBP: ffff8881dacd4e00 R08: 00000000ffffffff R09: 0000000000000019 R10: 000000000000072e R11: 0000000063666572 R12: ffff88812bfd9e00 R13: ffff8881c792d200 R14: ffff88810011c005 R15: ffff8881002099c0 FS: 0000000000000000(0000) GS:ffff88852c900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5694b5e000 CR3: 00000001153f6003 CR4: 0000000000370ea0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ? refcount_warn_saturate+0x12b/0x130 free_implicit_child_mr_work+0x180/0x1b0 [mlx5_ib] process_one_work+0x1cc/0x3c0 worker_thread+0x218/0x3c0 kthread+0xc6/0xf0 ret_from_fork+0x1f/0x30 </TASK>
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-modulesUpgrade kernel-64k-modules-coreUpgrade kernel-debug-develUpgrade kernel-rt-coreUpgrade kernel-rt-64k-modulesUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-zfcpdump-develUpgrade kernel-debugUpgrade kernel-rt-debugUpgrade kernel-rt-modules-extraUpgrade kernel-64k-develUpgrade kernel-zfcpdump-modules-extraUpgrade rtlaUpgrade kernel-rt-debug-develUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-cross-headersUpgrade kernel-coreUpgrade kernel-64k-debug-develUpgrade kernel-64k-modulesUpgrade kernel-rt-64k-debugUpgrade libperfUpgrade kernel-develUpgrade kernel-tools-libsUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-headersUpgrade kernel-debug-coreUpgrade kernelUpgrade kernel-64k-debug-coreUpgrade kernel-64kUpgrade kernel-64k-coreUpgrade kernel-modules-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-modulesUpgrade kernel-debug-uki-virtUpgrade python3-perfUpgrade kernel-rt-debug-coreUpgrade kernel-modules-extraUpgrade kernel-devel-matchedUpgrade kernel-tools-libs-develUpgrade kernel-64k-devel-matchedUpgrade kernel-rt-64k-coreUpgrade perfUpgrade kernel-64k-debug-modulesUpgrade kernel-zfcpdump-coreUpgrade kernel-uki-virt-addonsUpgrade kernel-docUpgrade kernel-64k-debug-modules-extraUpgrade kernel-rt-64kUpgrade kernel-debug-modules-coreUpgrade kernel-toolsUpgrade kernel-64k-debug-modules-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-64k-debug-develUpgrade kernel-rt-modulesUpgrade kernel-uki-virtUpgrade kernel-abi-stablelistsUpgrade kernel-debug-modules-extraUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-debug-modules-coreUpgrade kernel-64k-debug-devel-matchedUpgrade rvUpgrade kernel-rt-64k-debug-coreUpgrade kernel-rt-64k-modules-coreUpgrade kernel-rt-modules-coreUpgrade kernel-zfcpdumpUpgrade kernel-rtUpgrade kernel-rt-develUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-64k-debugUpgrade kernel-rt-64k-develUpgrade kernel-rt-64k-modules-extraUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-64k-modules-extra | Nov 20, 2025 | Nov 11, 2025 |
| Debian | — | Upgrade linux | May 15, 2025 | Feb 27, 2025 |
| Oracle_linux | — | Upgrade kernel | Nov 28, 2025 | Feb 27, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jul 9, 2025 | Feb 27, 2025 |
| Rocky_linux | — | Upgrade kernel-zfcpdump-modules-extraUpgrade libperfUpgrade kernel-zfcpdump-develUpgrade perf-debuginfoUpgrade kernel-modulesUpgrade kernel-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-zfcpdumpUpgrade perfUpgrade kernel-debugUpgrade kernel-devel-matchedUpgrade kernel-rt-coreUpgrade kernel-tools-libs-develUpgrade kernel-debug-develUpgrade kernel-rt-debuginfoUpgrade kernel-debuginfoUpgrade kernel-rt-modulesUpgrade python3-perfUpgrade kernel-modules-coreUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-debug-modules-extraUpgrade libperf-debuginfoUpgrade rtlaUpgrade kernel-debug-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-uki-virtUpgrade kernel-rt-debug-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-rt-develUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-uki-virt-addonsUpgrade kernel-modules-extraUpgrade kernel-develUpgrade kernel-rtUpgrade kernel-debug-uki-virtUpgrade python3-perf-debuginfoUpgrade kernel-rt-debugUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade rvUpgrade kernel-zfcpdump-coreUpgrade kernel-tools-libsUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-modules-coreUpgrade kernel-debug-modules-coreUpgrade kernel-debug-debuginfoUpgrade kernel-debuginfo-common-s390xUpgrade kernel-toolsUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-modules-extraUpgrade kernel-rt-debug-coreUpgrade kernel | Feb 5, 2026 | Nov 21, 2025 |
| Suse | — | Upgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade kernel-azure-vdsoUpgrade kselftests-kmp-64kbUpgrade gfs2-kmp-rtUpgrade kernel-64kb-develUpgrade kernel-64kb-optionalUpgrade kernel-source-azureUpgrade gfs2-kmp-64kbUpgrade cluster-md-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade kernel-rt-livepatch-develUpgrade dlm-kmp-64kbUpgrade dtb-amlogicUpgrade kernel-azure-optionalUpgrade dtb-exynosUpgrade dtb-marvellUpgrade dtb-mediatekUpgrade dtb-xilinxUpgrade kernel-kvmsmall-develUpgrade kernel-syms-azureUpgrade ocfs2-kmp-rtUpgrade kernel-rt-develUpgrade dtb-amazonUpgrade kernel-obs-qaUpgrade dtb-freescaleUpgrade kernel-kvmsmallUpgrade kernel-azure-develUpgrade kernel-64kbUpgrade dlm-kmp-azureUpgrade cluster-md-kmp-azureUpgrade kernel-debug-develUpgrade dtb-lgUpgrade dtb-appleUpgrade kernel-default-vdsoUpgrade kernel-azure-extraUpgrade kernel-macrosUpgrade kernel-symsUpgrade dtb-hisiliconUpgrade dtb-broadcomUpgrade kernel-sourceUpgrade kernel-default-livepatchUpgrade kernel-rt_debug-vdsoUpgrade kernel-debugUpgrade kernel-default-develUpgrade dtb-qcomUpgrade kernel-devel-azureUpgrade kernel-rtUpgrade kernel-syms-rtUpgrade kernel-devel-rtUpgrade kernel-docs-htmlUpgrade dtb-apmUpgrade reiserfs-kmp-azureUpgrade cluster-md-kmp-rtUpgrade gfs2-kmp-azureUpgrade dtb-caviumUpgrade kernel-source-rtUpgrade kernel-64kb-extraUpgrade kernel-docsUpgrade dtb-alteraUpgrade kselftests-kmp-defaultUpgrade kernel-develUpgrade kernel-defaultUpgrade kernel-debug-vdsoUpgrade kernel-rt-vdsoUpgrade reiserfs-kmp-defaultUpgrade kernel-default-baseUpgrade dtb-renesasUpgrade reiserfs-kmp-rtUpgrade kernel-rt_debug-develUpgrade kernel-rt-extraUpgrade kernel-kvmsmall-vdsoUpgrade dtb-nvidiaUpgrade kernel-rt-optionalUpgrade kernel-default-optionalUpgrade dtb-armUpgrade dtb-allwinnerUpgrade cluster-md-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-default-base-rebuildUpgrade kernel-azureUpgrade dtb-amdUpgrade reiserfs-kmp-64kbUpgrade ocfs2-kmp-azureUpgrade dtb-socionextUpgrade kernel-default-livepatch-develUpgrade kselftests-kmp-azureUpgrade dtb-sprdUpgrade ocfs2-kmp-defaultUpgrade kernel-source-vanillaUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-rtUpgrade gfs2-kmp-defaultUpgrade kernel-obs-buildUpgrade dtb-rockchipUpgrade dlm-kmp-rt | Apr 9, 2025 | Feb 27, 2025 |
| Ubuntu | — | Upgrade linux-image-oem-24.04Upgrade linux-image-azureUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1029-oracle-64kUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1031-nvidia-lowlatencyUpgrade linux-image-realtime-6.8.1Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1033-gcp-64kUpgrade linux-image-azure-fde-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1015-gkeopUpgrade linux-image-gkeUpgrade linux-image-gkeopUpgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1029-oracleUpgrade linux-image-6.8.0-1031-raspiUpgrade linux-image-azure-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-6.8.0-1028-gkeUpgrade linux-image-generic-64kUpgrade linux-image-virtual-6.8Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-gcp-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-raspiUpgrade linux-image-oem-22.04dUpgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1031-nvidia-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-aws-64kUpgrade linux-image-realtimeUpgrade linux-image-6.8.0-1032-aws-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-6.8.0-2026-raspi-realtimeUpgrade linux-image-oracleUpgrade linux-image-6.8.0-64-lowlatency-64kUpgrade linux-image-6.8.0-1031-oemUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oem-24.04aUpgrade linux-image-raspi-realtimeUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-1031-nvidia-64kUpgrade linux-image-kvmUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-awsUpgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-6.8.1-1025-realtimeUpgrade linux-image-azure-nvidiaUpgrade linux-image-ibm-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1022-azure-nvidiaUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-1033-gcpUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-aws-64k-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1031-nvidiaUpgrade linux-image-generic-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-gkeop-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-64-lowlatencyUpgrade linux-image-6.8.0-1029-ibmUpgrade linux-image-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-gcpUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1034-azure-fdeUpgrade linux-image-6.8.0-1034-azureUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1032-awsUpgrade linux-image-generic-64k-6.8 | Jun 26, 2025 | Feb 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 2, 2025 | Feb 27, 2025 |
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