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-livepatch-6.12.29-33.102Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel-toolsUpgrade kernel-libbpf-debuginfoUpgrade perfUpgrade kernel-develUpgrade kernel6.12-modules-extraUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-modules-extraUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12Upgrade python3-perfUpgrade perf-debuginfoUpgrade perf6.12Upgrade kernel-tools-debuginfoUpgrade kernel-modules-extra-commonUpgrade python3-perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernelUpgrade kernel-libbpf-develUpgrade kernel-livepatch-6.1.140-154.222Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-libbpf-staticUpgrade python3-perf-debuginfoUpgrade kernel6.12-debuginfoUpgrade kernel-debuginfo-common-x86_64 | Sep 9, 2025 | May 20, 2025 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | May 28, 2025 | May 20, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 20, 2025 |
| Suse | — | Upgrade kernel-default-optionalUpgrade dtb-socionextUpgrade dlm-kmp-rtUpgrade dtb-xilinxUpgrade kernel-develUpgrade dtb-amdUpgrade kernel-debug-develUpgrade reiserfs-kmp-rtUpgrade dtb-sprdUpgrade reiserfs-kmp-64kbUpgrade dtb-renesasUpgrade kselftests-kmp-defaultUpgrade dlm-kmp-azureUpgrade kernel-default-base-rebuildUpgrade cluster-md-kmp-64kbUpgrade reiserfs-kmp-azureUpgrade cluster-md-kmp-rtUpgrade kernel-docsUpgrade kernel-rt-extraUpgrade kselftests-kmp-azureUpgrade kernel-obs-buildUpgrade dtb-allwinnerUpgrade dtb-rockchipUpgrade kernel-default-livepatch-develUpgrade dtb-armUpgrade kernel-defaultUpgrade kernel-default-baseUpgrade kernel-rt-vdsoUpgrade kernel-rt_debugUpgrade kernel-azureUpgrade gfs2-kmp-defaultUpgrade kernel-source-rtUpgrade kernel-rt_debug-develUpgrade kselftests-kmp-rtUpgrade gfs2-kmp-azureUpgrade dtb-nvidiaUpgrade dtb-caviumUpgrade kernel-source-vanillaUpgrade kernel-kvmsmall-vdsoUpgrade kernel-64kb-extraUpgrade kernel-debug-vdsoUpgrade kernel-rt-optionalUpgrade dlm-kmp-defaultUpgrade ocfs2-kmp-azureUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade kernel-64kb-optionalUpgrade kernel-64kb-develUpgrade kernel-rtUpgrade kernel-sourceUpgrade kernel-azure-develUpgrade dtb-exynosUpgrade dtb-alteraUpgrade dlm-kmp-64kbUpgrade kernel-rt-livepatch-develUpgrade kernel-rt-develUpgrade dtb-qcomUpgrade dtb-lgUpgrade cluster-md-kmp-defaultUpgrade kselftests-kmp-64kbUpgrade kernel-rt_debug-vdsoUpgrade kernel-symsUpgrade dtb-appleUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-64kbUpgrade kernel-zfcpdumpUpgrade kernel-macrosUpgrade kernel-kvmsmall-develUpgrade kernel-kvmsmallUpgrade kernel-default-develUpgrade dtb-freescaleUpgrade ocfs2-kmp-rtUpgrade gfs2-kmp-rtUpgrade gfs2-kmp-64kbUpgrade dtb-mediatekUpgrade kernel-docs-htmlUpgrade dtb-marvellUpgrade dtb-apmUpgrade kernel-source-azureUpgrade kernel-64kbUpgrade dtb-amlogicUpgrade kernel-syms-azureUpgrade kernel-devel-rtUpgrade kernel-default-vdsoUpgrade kernel-default-extraUpgrade kernel-debugUpgrade kernel-azure-optionalUpgrade kernel-syms-rtUpgrade dtb-amazonUpgrade kernel-devel-azureUpgrade kernel-azure-extraUpgrade dtb-broadcomUpgrade kernel-obs-qaUpgrade kernel-default-livepatchUpgrade kernel-azure-vdsoUpgrade dtb-hisilicon | Dec 5, 2025 | Jul 8, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-6.14Upgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-nvidiaUpgrade linux-image-realtime-6.8.1Upgrade linux-image-6.14.0-24-generic-64kUpgrade linux-image-6.14.0-24-genericUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-gcp-64k-6.14Upgrade linux-image-oem-22.04dUpgrade linux-image-gcp-6.8Upgrade linux-image-gke-64kUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-nvidia-6.8Upgrade linux-image-fipsUpgrade linux-image-generic-64k-6.14Upgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-6.8.0-1046-azureUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-oracleUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-lowlatency-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-6.14.0-1009-oracle-64kUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-6.14.0-1010-azureUpgrade linux-image-raspiUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-azure-6.14Upgrade linux-image-gcp-fipsUpgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-lowlatencyUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oem-6.14Upgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-oem-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-oracle-6.14Upgrade linux-image-genericUpgrade linux-image-realtime-6.14Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.14.0-1007-oemUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.14.0-1006-realtimeUpgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-gcpUpgrade linux-image-azureUpgrade linux-image-aws-64kUpgrade linux-image-raspi-6.14Upgrade linux-image-generic-64k-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-fips-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.14.0-1009-oracleUpgrade linux-image-oem-22.04bUpgrade linux-image-azure-fipsUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-azure-fips-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-awsUpgrade linux-image-6.14.0-1009-awsUpgrade linux-image-raspi-6.8Upgrade linux-image-kvmUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-nvidia-64kUpgrade linux-image-gkeUpgrade linux-image-6.14.0-1011-gcpUpgrade linux-image-6.14.0-1009-aws-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-oracle-6.8Upgrade linux-image-oem-24.04cUpgrade linux-image-oem-22.04cUpgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-oracle-64k-6.14Upgrade linux-image-oem-24.04aUpgrade linux-image-oem-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-xilinx-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-aws-64k-6.14Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-6.8.0-1046-awsUpgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-gcp-6.14Upgrade linux-image-raspi-realtimeUpgrade linux-image-gke-64k-6.8Upgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-virtualUpgrade linux-image-realtimeUpgrade linux-image-ibmUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-ibm-classicUpgrade linux-image-ibm-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-xilinxUpgrade linux-image-intel-iotgUpgrade linux-image-virtual-6.14Upgrade linux-image-aws-6.14Upgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-100-genericUpgrade linux-image-6.14.0-1011-gcp-64kUpgrade linux-image-6.14.0-1009-raspi | 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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