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