In the Linux kernel, the following vulnerability has been resolved:
vxlan: vnifilter: Fix unlocked deletion of default FDB entry
When a VNI is deleted from a VXLAN device in 'vnifilter' mode, the FDB entry associated with the default remote (assuming one was configured) is deleted without holding the hash lock. This is wrong and will result in a warning [1] being generated by the lockdep annotation that was added by commit ebe642067455 ("vxlan: Create wrappers for FDB lookup").
Reproducer:
# ip link add vx0 up type vxlan dstport 4789 external vnifilter local 192.0.2.1 # bridge vni add vni 10010 remote 198.51.100.1 dev vx0 # bridge vni del vni 10010 dev vx0
Fix by acquiring the hash lock before the deletion and releasing it afterwards. Blame the original commit that introduced the issue rather than the one that exposed it.
[1] WARNING: CPU: 3 PID: 392 at drivers/net/vxlan/vxlan_core.c:417 vxlan_find_mac+0x17f/0x1a0 [...] RIP: 0010:vxlan_find_mac+0x17f/0x1a0 [...] Call Trace: <TASK> __vxlan_fdb_delete+0xbe/0x560 vxlan_vni_delete_group+0x2ba/0x940 vxlan_vni_del.isra.0+0x15f/0x580 vxlan_process_vni_filter+0x38b/0x7b0 vxlan_vnifilter_process+0x3bb/0x510 rtnetlink_rcv_msg+0x2f7/0xb70 netlink_rcv_skb+0x131/0x360 netlink_unicast+0x426/0x710 netlink_sendmsg+0x75a/0xc20 __sock_sendmsg+0xc1/0x150 ____sys_sendmsg+0x5aa/0x7b0 ___sys_sendmsg+0xfc/0x180 __sys_sendmsg+0x121/0x1b0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x4b/0x53
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 |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-libbpf-debuginfoUpgrade python3-perfUpgrade kernel-modules-extraUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12Upgrade kernel-livepatch-6.12.29-33.102Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade kernel6.12-modules-extraUpgrade kernel-develUpgrade kernel-headersUpgrade kernel-tools-develUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade perfUpgrade perf6.12-debuginfoUpgrade kernel-libbpfUpgrade kernel-modules-extra-commonUpgrade kernelUpgrade kernel6.12-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade python3-perf6.12Upgrade python3-perf-debuginfoUpgrade perf6.12Upgrade kernel-tools-debuginfoUpgrade kernel-livepatch-6.1.140-154.222Upgrade kernel-libbpf-staticUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64 | Sep 9, 2025 | May 20, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | May 28, 2025 | May 20, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 20, 2025 |
| Suse | — | Upgrade kernel-rt-develUpgrade kernel-devel-rtUpgrade kernel-debugUpgrade kernel-azure-vdsoUpgrade kernel-default-livepatchUpgrade kernel-default-extraUpgrade kernel-default-vdsoUpgrade kernel-syms-azureUpgrade kernel-rtUpgrade kernel-azure-extraUpgrade kernel-obs-qaUpgrade dtb-freescaleUpgrade kernel-devel-azureUpgrade ocfs2-kmp-rtUpgrade dtb-hisiliconUpgrade kernel-kvmsmall-develUpgrade kernel-macrosUpgrade ocfs2-kmp-64kbUpgrade dtb-amazonUpgrade dtb-broadcomUpgrade kernel-syms-rtUpgrade kernel-zfcpdumpUpgrade kernel-docs-htmlUpgrade kernel-source-azureUpgrade dtb-marvellUpgrade dtb-apmUpgrade dtb-appleUpgrade kernel-64kb-develUpgrade kernel-64kb-optionalUpgrade dtb-mediatekUpgrade cluster-md-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade kernel-sourceUpgrade kernel-symsUpgrade dtb-qcomUpgrade kernel-rt-livepatch-develUpgrade cluster-md-kmp-azureUpgrade gfs2-kmp-64kbUpgrade dtb-alteraUpgrade kselftests-kmp-64kbUpgrade kernel-azure-develUpgrade dlm-kmp-64kbUpgrade dtb-amlogicUpgrade kernel-64kbUpgrade kernel-azure-optionalUpgrade dtb-exynosUpgrade gfs2-kmp-rtUpgrade dtb-lgUpgrade kernel-default-develUpgrade kernel-kvmsmallUpgrade kernel-default-baseUpgrade dtb-renesasUpgrade dlm-kmp-defaultUpgrade kernel-64kb-extraUpgrade reiserfs-kmp-azureUpgrade kernel-rt_debugUpgrade gfs2-kmp-defaultUpgrade dtb-caviumUpgrade kselftests-kmp-rtUpgrade kernel-source-vanillaUpgrade reiserfs-kmp-rtUpgrade reiserfs-kmp-64kbUpgrade dtb-nvidiaUpgrade kernel-kvmsmall-vdsoUpgrade kernel-default-livepatch-develUpgrade kernel-azureUpgrade kernel-obs-buildUpgrade dtb-socionextUpgrade dtb-amdUpgrade dlm-kmp-rtUpgrade dlm-kmp-azureUpgrade kernel-source-rtUpgrade kernel-rt-optionalUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade dtb-allwinnerUpgrade kernel-debug-vdsoUpgrade kernel-rt-vdsoUpgrade kernel-debug-develUpgrade kernel-rt_debug-develUpgrade dtb-sprdUpgrade kernel-default-base-rebuildUpgrade cluster-md-kmp-64kbUpgrade dtb-rockchipUpgrade gfs2-kmp-azureUpgrade kernel-defaultUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-defaultUpgrade kernel-default-optionalUpgrade kernel-develUpgrade dtb-xilinxUpgrade dtb-armUpgrade cluster-md-kmp-rtUpgrade kselftests-kmp-azureUpgrade kernel-rt-extraUpgrade kernel-docs | Dec 5, 2025 | Jul 8, 2025 |
| Ubuntu | — | Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-oem-24.04cUpgrade linux-image-6.14.0-1009-aws-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-nvidia-64kUpgrade linux-image-gcpUpgrade linux-image-gkeUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-awsUpgrade linux-image-azureUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-aws-64k-6.14Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-ibm-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.14.0-1009-oracleUpgrade linux-image-oem-22.04bUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.8.0-100-genericUpgrade linux-image-aws-lts-24.04Upgrade linux-image-azure-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-raspi-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-raspi-6.14Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-kvmUpgrade linux-image-6.14.0-1011-gcpUpgrade linux-image-aws-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-oem-24.04aUpgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-aws-6.14Upgrade linux-image-virtual-6.14Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-intel-iotgUpgrade linux-image-oem-24.04Upgrade linux-image-gke-64k-6.8Upgrade linux-image-oracle-64k-6.14Upgrade linux-image-gcp-6.14Upgrade linux-image-xilinxUpgrade linux-image-aws-64k-6.8Upgrade linux-image-xilinx-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-aws-fips-6.8Upgrade linux-image-generic-64kUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.14.0-1009-awsUpgrade linux-image-6.14.0-1011-gcp-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-realtimeUpgrade linux-image-virtualUpgrade linux-image-ibm-classicUpgrade linux-image-6.14.0-1009-raspiUpgrade linux-image-fips-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-ibmUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-oem-22.04Upgrade linux-image-generic-6.14Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-6.14.0-1006-realtimeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oracle-6.14Upgrade linux-image-realtime-6.14Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-6.14.0-1010-azureUpgrade linux-image-6.14.0-1007-oemUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-raspiUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-generic-64k-6.14Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gkeopUpgrade linux-image-gke-64kUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-generic-lpaeUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.14.0-24-generic-64kUpgrade linux-image-realtime-6.8.1Upgrade linux-image-nvidiaUpgrade linux-image-aws-fipsUpgrade linux-image-oracleUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.14.0-1009-oracle-64kUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1046-azureUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-genericUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-lowlatency-64kUpgrade linux-image-azure-6.14Upgrade linux-image-gkeop-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-oem-22.04dUpgrade linux-image-fipsUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-gcp-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-6.14.0-24-genericUpgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatencyUpgrade linux-image-gcp-fipsUpgrade linux-image-oem-6.14 | Jun 26, 2025 | May 20, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 8, 2025 | May 20, 2025 |
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