{"id":"DEBIAN-CVE-2024-50252","details":"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:  \u003cTASK\u003e  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):     [\u003c00000000df89c55d\u003e] __kmalloc_cache_noprof+0x1da/0x260     [\u003c00000000ff2a1ddb\u003e] mlxsw_sp_ipv6_addr_kvdl_index_get+0x281/0x340     [\u003c000000009ddd445d\u003e] mlxsw_sp_router_netdevice_event+0x47b/0x1240     [\u003c00000000743e7757\u003e] notifier_call_chain+0x5a/0xd0     [\u003c000000007c7b9e13\u003e] call_netdevice_notifiers_info+0x39/0x90     [\u003c000000002509645d\u003e] register_netdevice+0x5f7/0x7a0     [\u003c00000000c2e7d2a9\u003e] ip6gre_newlink_common.isra.0+0x65/0x130     [\u003c0000000087cd6d8d\u003e] ip6gre_newlink+0x72/0x120     [\u003c000000004df7c7cc\u003e] rtnl_newlink+0x471/0xa20     [\u003c0000000057ed632a\u003e] rtnetlink_rcv_msg+0x142/0x3f0     [\u003c0000000032e0d5b5\u003e] netlink_rcv_skb+0x50/0x100     [\u003c00000000908bca63\u003e] netlink_unicast+0x242/0x390     [\u003c00000000cdbe1c87\u003e] netlink_sendmsg+0x1de/0x420     [\u003c0000000011db153e\u003e] ____sys_sendmsg+0x2bd/0x320     [\u003c000000003b6d53eb\u003e] ___sys_sendmsg+0x9a/0xe0     [\u003c00000000cae27c62\u003e] __sys_sendmsg+0x7a/0xd0","modified":"2026-09-15T09:03:15.588012634Z","published":"2024-11-09T11:15:10.973Z","upstream":["CVE-2024-50252"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50252"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.119-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50252.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50252.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50252.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}