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>
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-uki-virtUpgrade kernel-64k-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-rtUpgrade kernel-zfcpdump-modulesUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-64kUpgrade kernel-debug-modules-extraUpgrade kernel-64k-debugUpgrade kernel-rt-modulesUpgrade kernel-rt-64k-develUpgrade kernel-64k-debug-modules-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-64k-debug-develUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-64k-modules-extraUpgrade kernel-uki-virt-addonsUpgrade kernel-zfcpdumpUpgrade kernel-rt-modules-coreUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-64k-modules-extraUpgrade kernel-64k-debug-modules-extraUpgrade kernel-rt-64k-coreUpgrade kernel-rt-64k-modules-coreUpgrade kernel-zfcpdump-coreUpgrade perfUpgrade kernel-docUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-develUpgrade rvUpgrade kernel-tools-libs-develUpgrade kernel-rt-64k-debug-coreUpgrade kernel-64k-devel-matchedUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-modules-extraUpgrade kernel-develUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-64k-modules-coreUpgrade kernel-64k-develUpgrade libperfUpgrade kernel-modulesUpgrade kernel-debug-develUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-debug-uki-virtUpgrade kernel-tools-libsUpgrade kernel-64k-debug-coreUpgrade kernel-rt-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernelUpgrade kernel-rt-64k-debugUpgrade kernel-coreUpgrade kernel-64k-modulesUpgrade kernel-cross-headersUpgrade kernel-64k-debug-develUpgrade kernel-64kUpgrade kernel-rt-debug-develUpgrade kernel-debug-coreUpgrade rtlaUpgrade kernel-headersUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modulesUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-modules-coreUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-64k-modulesUpgrade kernel-64k-coreUpgrade kernel-rt-debugUpgrade kernel-debugUpgrade kernel-devel-matchedUpgrade python3-perfUpgrade kernel-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 kernel-rtUpgrade kernelNo solution exists | Jul 9, 2025 | Feb 27, 2025 |
| Rocky_linux | — | Upgrade kernel-modules-coreUpgrade kernel-zfcpdumpUpgrade kernel-modulesUpgrade kernel-rt-debuginfoUpgrade perf-debuginfoUpgrade perfUpgrade kernel-rt-debug-modules-coreUpgrade kernel-tools-libs-develUpgrade kernel-uki-virtUpgrade kernel-debugUpgrade kernel-debug-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-zfcpdump-modules-coreUpgrade libperfUpgrade kernel-rt-coreUpgrade kernel-rt-modulesUpgrade kernel-debuginfoUpgrade python3-perfUpgrade kernel-rt-debug-modules-extraUpgrade kernel-devel-matchedUpgrade kernel-debug-develUpgrade kernel-coreUpgrade kernel-zfcpdump-develUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-debug-develUpgrade libperf-debuginfoUpgrade rtlaUpgrade kernel-tools-debuginfoUpgrade kernel-rtUpgrade kernel-rt-develUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-uki-virt-addonsUpgrade kernel-modules-extraUpgrade kernel-develUpgrade rvUpgrade kernel-rt-debug-debuginfoUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-libsUpgrade kernel-zfcpdump-devel-matchedUpgrade python3-perf-debuginfoUpgrade kernel-toolsUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modules-extraUpgrade kernelUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-modules-extraUpgrade kernel-rt-debugUpgrade kernel-debuginfo-common-s390xUpgrade kernel-debug-uki-virtUpgrade kernel-rt-modules-coreUpgrade kernel-debug-debuginfoUpgrade kernel-debug-modules-coreUpgrade kernel-debug-modules | Feb 5, 2026 | Nov 21, 2025 |
| Suse | — | Upgrade dtb-xilinxUpgrade cluster-md-kmp-defaultUpgrade kernel-source-azureUpgrade kernel-kvmsmall-develUpgrade dtb-amlogicUpgrade dlm-kmp-64kbUpgrade dtb-apmUpgrade dtb-appleUpgrade gfs2-kmp-64kbUpgrade kernel-obs-qaUpgrade kernel-64kb-optionalUpgrade dtb-exynosUpgrade dtb-lgUpgrade kernel-devel-rtUpgrade kernel-symsUpgrade kernel-rt-livepatch-develUpgrade kernel-debugUpgrade dtb-broadcomUpgrade kernel-macrosUpgrade dtb-freescaleUpgrade kernel-docs-htmlUpgrade kernel-kvmsmallUpgrade dtb-qcomUpgrade kernel-default-vdsoUpgrade dtb-marvellUpgrade dtb-mediatekUpgrade kernel-debug-develUpgrade kernel-rtUpgrade kernel-64kbUpgrade kernel-rt-develUpgrade kernel-syms-azureUpgrade cluster-md-kmp-azureUpgrade dlm-kmp-azureUpgrade ocfs2-kmp-rtUpgrade dtb-amazonUpgrade kernel-azure-optionalUpgrade kernel-default-livepatchUpgrade kernel-devel-azureUpgrade kernel-azure-vdsoUpgrade kernel-rt_debug-vdsoUpgrade kernel-sourceUpgrade kernel-syms-rtUpgrade dtb-hisiliconUpgrade kernel-default-extraUpgrade kernel-64kb-develUpgrade kernel-zfcpdumpUpgrade kernel-azure-develUpgrade kernel-azure-extraUpgrade gfs2-kmp-rtUpgrade kernel-default-develUpgrade kselftests-kmp-64kbUpgrade ocfs2-kmp-64kbUpgrade kernel-defaultUpgrade kernel-rt_debugUpgrade dtb-alteraUpgrade kernel-debug-vdsoUpgrade dtb-allwinnerUpgrade kernel-default-optionalUpgrade kernel-kvmsmall-vdsoUpgrade kselftests-kmp-defaultUpgrade kernel-docsUpgrade kernel-develUpgrade ocfs2-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-rtUpgrade gfs2-kmp-defaultUpgrade kernel-rt_debug-develUpgrade kernel-rt-optionalUpgrade kernel-rt-vdsoUpgrade reiserfs-kmp-defaultUpgrade reiserfs-kmp-64kbUpgrade kernel-obs-buildUpgrade kernel-source-vanillaUpgrade dlm-kmp-rtUpgrade dtb-sprdUpgrade ocfs2-kmp-azureUpgrade kernel-default-base-rebuildUpgrade kernel-azureUpgrade dtb-amdUpgrade dtb-rockchipUpgrade reiserfs-kmp-azureUpgrade gfs2-kmp-azureUpgrade kernel-source-rtUpgrade dtb-caviumUpgrade cluster-md-kmp-rtUpgrade kernel-64kb-extraUpgrade kselftests-kmp-azureUpgrade kernel-default-livepatch-develUpgrade reiserfs-kmp-rtUpgrade kernel-rt-extraUpgrade kernel-default-baseUpgrade dtb-socionextUpgrade dtb-renesasUpgrade dtb-nvidiaUpgrade dtb-arm | Apr 9, 2025 | Feb 27, 2025 |
| Ubuntu | — | Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-raspiUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-raspi-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1028-gkeUpgrade linux-image-gcp-64kUpgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1029-oracle-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1032-aws-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-64-lowlatency-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-1033-gcp-64kUpgrade linux-image-6.8.0-1015-gkeopUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azure-fde-6.8Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1031-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1029-oracleUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1031-raspiUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-2026-raspi-realtimeUpgrade linux-image-realtimeUpgrade linux-image-6.8.0-1031-nvidia-lowlatency-64kUpgrade linux-image-oracleUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1031-oemUpgrade linux-image-lowlatency-6.8Upgrade linux-image-azureUpgrade linux-image-oem-22.04Upgrade linux-image-nvidiaUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-ibmUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1034-azureUpgrade linux-image-gcpUpgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-azure-nvidiaUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1032-awsUpgrade linux-image-6.8.0-1031-nvidia-64kUpgrade linux-image-6.8.0-1031-nvidiaUpgrade linux-image-oem-22.04aUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-1033-gcpUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-oracle-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-aws-64k-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidia-64kUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-oem-24.04aUpgrade linux-image-raspi-realtimeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.1-1025-realtimeUpgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-6.8.0-1022-azure-nvidiaUpgrade linux-image-awsUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-oem-6.8Upgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1034-azure-fdeUpgrade linux-image-virtualUpgrade linux-image-lowlatencyUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1029-ibmUpgrade linux-image-oem-22.04bUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-64-lowlatencyUpgrade linux-image-gke-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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