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-rt-64k-debug-develUpgrade kernel-64k-modules-extraUpgrade kernel-64k-devel-matchedUpgrade kernel-rt-modulesUpgrade kernel-64k-debug-modules-coreUpgrade kernel-zfcpdump-modulesUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-64k-debug-coreUpgrade kernel-abi-stablelistsUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-tools-libs-develUpgrade kernel-rt-develUpgrade kernel-rt-debug-modules-coreUpgrade kernel-zfcpdumpUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-64k-debugUpgrade kernel-rt-modules-coreUpgrade kernel-64k-debug-modulesUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-uki-virt-addonsUpgrade kernel-64k-debug-modules-extraUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-64k-modules-coreUpgrade kernel-rt-64k-modules-extraUpgrade rvUpgrade kernel-toolsUpgrade kernel-docUpgrade kernel-uki-virtUpgrade kernel-rt-64kUpgrade perfUpgrade kernel-rt-64k-develUpgrade kernel-debug-modules-coreUpgrade kernel-rt-64k-coreUpgrade kernel-rtUpgrade kernel-debug-modules-extraUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-develUpgrade kernel-rt-debugUpgrade kernel-64k-develUpgrade kernel-64k-modulesUpgrade kernel-64k-debug-develUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-cross-headersUpgrade kernel-rt-64k-debugUpgrade libperfUpgrade python3-perfUpgrade kernel-modules-extraUpgrade kernel-64k-debug-coreUpgrade kernel-tools-libsUpgrade kernel-modulesUpgrade kernel-rt-debug-coreUpgrade rtlaUpgrade kernel-debug-uki-virtUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-debug-coreUpgrade kernel-devel-matchedUpgrade kernel-headersUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-modules-coreUpgrade kernel-rt-coreUpgrade kernel-rt-64k-modulesUpgrade kernelUpgrade kernel-zfcpdump-develUpgrade kernel-debug-develUpgrade kernel-64k-modules-coreUpgrade kernel-rt-modules-extraUpgrade kernel-64k-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-debugUpgrade kernel-64kUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-develUpgrade kernel-core | Nov 20, 2025 | Nov 11, 2025 |
| Debian | — | No solution existsUpgrade linux | May 15, 2025 | Feb 27, 2025 |
| Oracle_linux | — | Upgrade kernel | Nov 28, 2025 | Feb 27, 2025 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | Jul 9, 2025 | Feb 27, 2025 |
| Rocky_linux | — | Upgrade kernel-tools-debuginfoUpgrade rvUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-debug-modulesUpgrade kernelUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-rt-debug-coreUpgrade kernel-develUpgrade python3-perf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-develUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-modules-extraUpgrade kernel-toolsUpgrade kernel-zfcpdump-modulesUpgrade kernel-rtUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debug-modules-coreUpgrade kernel-rt-debug-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernel-tools-libsUpgrade kernel-rt-debugUpgrade kernel-debug-uki-virtUpgrade kernel-debuginfo-common-s390xUpgrade kernel-rt-modules-coreUpgrade kernel-debug-debuginfoUpgrade kernel-debug-devel-matchedUpgrade libperf-debuginfoUpgrade kernel-modules-coreUpgrade kernel-zfcpdump-develUpgrade kernel-coreUpgrade perf-debuginfoUpgrade libperfUpgrade kernel-zfcpdumpUpgrade kernel-rt-debug-develUpgrade rtlaUpgrade kernel-debug-develUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-uki-virtUpgrade python3-perfUpgrade kernel-rt-modulesUpgrade kernel-debug-coreUpgrade kernel-debuginfoUpgrade kernel-tools-libs-develUpgrade kernel-rt-debug-modules-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debuginfoUpgrade kernel-rt-coreUpgrade kernel-modulesUpgrade kernel-debugUpgrade perfUpgrade kernel-devel-matched | Feb 5, 2026 | Nov 21, 2025 |
| Suse | — | Upgrade ocfs2-kmp-64kbUpgrade kernel-default-develUpgrade kernel-default-extraUpgrade kernel-kvmsmallUpgrade kernel-azure-extraUpgrade ocfs2-kmp-rtUpgrade kernel-docs-htmlUpgrade kselftests-kmp-64kbUpgrade kernel-64kb-develUpgrade gfs2-kmp-rtUpgrade kernel-azure-optionalUpgrade kernel-zfcpdumpUpgrade dtb-amlogicUpgrade cluster-md-kmp-defaultUpgrade kernel-source-azureUpgrade kernel-kvmsmall-develUpgrade dtb-xilinxUpgrade dtb-mediatekUpgrade dtb-exynosUpgrade kernel-64kb-optionalUpgrade kernel-rt-livepatch-develUpgrade gfs2-kmp-64kbUpgrade dtb-apmUpgrade dlm-kmp-64kbUpgrade kernel-devel-rtUpgrade dtb-marvellUpgrade kernel-azure-vdsoUpgrade kernel-devel-azureUpgrade kernel-default-livepatchUpgrade dtb-hisiliconUpgrade kernel-syms-rtUpgrade kernel-sourceUpgrade kernel-rt_debug-vdsoUpgrade dtb-qcomUpgrade kernel-debug-develUpgrade cluster-md-kmp-azureUpgrade kernel-64kbUpgrade dlm-kmp-azureUpgrade kernel-symsUpgrade dtb-broadcomUpgrade kernel-macrosUpgrade kernel-debugUpgrade dtb-freescaleUpgrade dtb-appleUpgrade kernel-obs-qaUpgrade kernel-default-vdsoUpgrade dtb-lgUpgrade dtb-amazonUpgrade kernel-syms-azureUpgrade kernel-rtUpgrade kernel-azure-develUpgrade kernel-rt-devel | Apr 9, 2025 | Feb 27, 2025 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1032-awsUpgrade linux-image-6.8.0-1034-azureUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1031-nvidia-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-oracle-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-gke-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-64-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-1029-ibmUpgrade linux-image-6.8.0-1031-nvidiaUpgrade linux-image-virtualUpgrade linux-image-ibmUpgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-gcpUpgrade linux-image-6.8.0-1034-azure-fdeUpgrade linux-image-azure-nvidiaUpgrade linux-image-generic-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-oem-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-kvmUpgrade linux-image-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-ibm-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-6.8.1-1025-realtimeUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-aws-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1022-azure-nvidiaUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-1033-gcpUpgrade linux-image-6.8.0-64-lowlatency-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1029-oracleUpgrade linux-image-oracleUpgrade linux-image-realtimeUpgrade linux-image-genericUpgrade linux-image-6.8.0-1031-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1032-aws-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-generic-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1031-oemUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04Upgrade linux-image-raspiUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1031-raspiUpgrade linux-image-6.8.0-2026-raspi-realtimeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-aws-64kUpgrade linux-image-gcp-64kUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gkeopUpgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1015-gkeopUpgrade linux-image-gkeUpgrade linux-image-azureUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1033-gcp-64kUpgrade linux-image-6.8.0-1031-nvidia-lowlatencyUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-azure-fde-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-64-genericUpgrade linux-image-6.8.0-1028-gkeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1029-oracle-64kUpgrade linux-image-gcp-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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