In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrum_ipip: Fix memory leak when changing remote IPv6 address
The device stores IPv6 addresses that are used for encapsulation in linear memory that is managed by the driver.
Changing the remote address of an ip6gre net device never worked properly, but since cited commit the following reproducer [1] would result in a warning [2] and a memory leak [3]. The problem is that the new remote address is never added by the driver to its hash table (and therefore the device) and the old address is never removed from it.
Fix by programming the new address when the configuration of the ip6gre net device changes and removing the old one. If the address did not change, then the above would result in increasing the reference count of the address and then decreasing it.
[1] # ip link add name bla up type ip6gre local 2001:db8:1::1 remote 2001:db8:2::1 tos inherit ttl inherit # ip link set dev bla type ip6gre remote 2001:db8:3::1 # ip link del dev bla # devlink dev reload pci/0000:01:00.0
[2] WARNING: CPU: 0 PID: 1682 at drivers/net/ethernet/mellanox/mlxsw/spectrum.c:3002 mlxsw_sp_ipv6_addr_put+0x140/0x1d0 Modules linked in: CPU: 0 UID: 0 PID: 1682 Comm: ip Not tainted 6.12.0-rc3-custom-g86b5b55bc835 #151 Hardware name: Nvidia SN5600/VMOD0013, BIOS 5.13 05/31/2023 RIP: 0010:mlxsw_sp_ipv6_addr_put+0x140/0x1d0 [...] Call Trace: <TASK> mlxsw_sp_router_netdevice_event+0x55f/0x1240 notifier_call_chain+0x5a/0xd0 call_netdevice_notifiers_info+0x39/0x90 unregister_netdevice_many_notify+0x63e/0x9d0 rtnl_dellink+0x16b/0x3a0 rtnetlink_rcv_msg+0x142/0x3f0 netlink_rcv_skb+0x50/0x100 netlink_unicast+0x242/0x390 netlink_sendmsg+0x1de/0x420 ____sys_sendmsg+0x2bd/0x320 ___sys_sendmsg+0x9a/0xe0 __sys_sendmsg+0x7a/0xd0 do_syscall_64+0x9e/0x1a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
[3] unreferenced object 0xffff898081f597a0 (size 32): comm "ip", pid 1626, jiffies 4294719324 hex dump (first 32 bytes): 20 01 0d b8 00 02 00 00 00 00 00 00 00 00 00 01 ............... 21 49 61 83 80 89 ff ff 00 00 00 00 01 00 00 00 !Ia............. backtrace (crc fd9be911): [<00000000df89c55d>] __kmalloc_cache_noprof+0x1da/0x260 [<00000000ff2a1ddb>] mlxsw_sp_ipv6_addr_kvdl_index_get+0x281/0x340 [<000000009ddd445d>] mlxsw_sp_router_netdevice_event+0x47b/0x1240 [<00000000743e7757>] notifier_call_chain+0x5a/0xd0 [<000000007c7b9e13>] call_netdevice_notifiers_info+0x39/0x90 [<000000002509645d>] register_netdevice+0x5f7/0x7a0 [<00000000c2e7d2a9>] ip6gre_newlink_common.isra.0+0x65/0x130 [<0000000087cd6d8d>] ip6gre_newlink+0x72/0x120 [<000000004df7c7cc>] rtnl_newlink+0x471/0xa20 [<0000000057ed632a>] rtnetlink_rcv_msg+0x142/0x3f0 [<0000000032e0d5b5>] netlink_rcv_skb+0x50/0x100 [<00000000908bca63>] netlink_unicast+0x242/0x390 [<00000000cdbe1c87>] netlink_sendmsg+0x1de/0x420 [<0000000011db153e>] ____sys_sendmsg+0x2bd/0x320 [<000000003b6d53eb>] ___sys_sendmsg+0x9a/0xe0 [<00000000cae27c62>] __sys_sendmsg+0x7a/0xd0
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-zfcpdump-modulesUpgrade kernel-tools-libs-develUpgrade kernel-rtUpgrade kernel-64k-debug-devel-matchedUpgrade rvUpgrade kernel-64k-devel-matchedUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-develUpgrade kernel-rt-debugUpgrade kernel-rt-debug-modules-extraUpgrade kernel-64k-debugUpgrade kernel-uki-virtUpgrade bpftoolUpgrade kernel-rt-debug-modules-coreUpgrade kernel-debug-modules-coreUpgrade kernel-develUpgrade kernel-zfcpdump-coreUpgrade kernel-debug-modules-extraUpgrade kernel-64k-debug-develUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-debug-modulesUpgrade kernel-64k-debug-modules-coreUpgrade kernel-coreUpgrade kernel-docUpgrade kernel-rt-modules-coreUpgrade perfUpgrade kernel-64k-debug-modulesUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-zfcpdumpUpgrade kernel-toolsUpgrade kernel-modulesUpgrade kernel-64k-modules-extraUpgrade kernel-tools-libsUpgrade kernel-rt-modules-extraUpgrade kernel-zfcpdump-develUpgrade kernel-debug-devel-matchedUpgrade kernel-debug-modulesUpgrade kernel-debug-develUpgrade kernel-debugUpgrade kernel-devel-matchedUpgrade kernel-64k-debug-modules-extraUpgrade kernel-cross-headersUpgrade kernel-64k-debug-coreUpgrade kernel-64k-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debug-develUpgrade kernel-headersUpgrade kernel-abi-stablelistsUpgrade rtlaUpgrade kernel-debug-uki-virtUpgrade kernel-rt-coreUpgrade kernel-debug-coreUpgrade kernel-modules-coreUpgrade python3-perfUpgrade libperfUpgrade kernelUpgrade kernel-64k-coreUpgrade kernel-64k-modules-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-modules-extraUpgrade kernel-64kUpgrade kernel-64k-devel | Jan 14, 2025 | Nov 9, 2024 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Dec 2, 2024 | Nov 9, 2024 |
| Oracle_linux | — | Upgrade kernel | Jan 11, 2025 | Nov 9, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jan 10, 2025 | Nov 9, 2024 |
| Ubuntu | — | Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-gkeUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-gkeopUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-virtualUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oracleUpgrade linux-image-ibm-classicUpgrade linux-image-awsUpgrade linux-image-azure-nvidiaUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-gcpUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-kvmUpgrade linux-image-azureUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-raspiUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-oracle-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-ibmUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.8.0-58-genericUpgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-oem-24.04aUpgrade linux-image-6.11.0-1005-realtime | Feb 20, 2025 | Nov 9, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Nov 9, 2024 |
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