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