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

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5818 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5818-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     November 24, 2024                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : linux     CVE ID         : CVE-2022-45888 CVE-2023-52812 CVE-2024-26952 CVE-2024-26954                      CVE-2024-35964 CVE-2024-36244 CVE-2024-36478 CVE-2024-36914                      CVE-2024-36915 CVE-2024-36923 CVE-2024-38540 CVE-2024-38553                      CVE-2024-41080 CVE-2024-42322 CVE-2024-43868 CVE-2024-43904                      CVE-2024-43911 CVE-2024-44949 CVE-2024-49950 CVE-2024-49960                      CVE-2024-49974 CVE-2024-49986 CVE-2024-49991 CVE-2024-50012                      CVE-2024-50036 CVE-2024-50067 CVE-2024-50072 CVE-2024-50126                      CVE-2024-50215 CVE-2024-50218 CVE-2024-50228 CVE-2024-50229                      CVE-2024-50230 CVE-2024-50232 CVE-2024-50233 CVE-2024-50234                      CVE-2024-50235 CVE-2024-50236 CVE-2024-50237 CVE-2024-50242                      CVE-2024-50243 CVE-2024-50244 CVE-2024-50245 CVE-2024-50247                      CVE-2024-50249 CVE-2024-50250 CVE-2024-50251 CVE-2024-50252                      CVE-2024-50255 CVE-2024-50256 CVE-2024-50257 CVE-2024-50259                      CVE-2024-50261 CVE-2024-50262 CVE-2024-50264 CVE-2024-50265                      CVE-2024-50267 CVE-2024-50268 CVE-2024-50269 CVE-2024-50271                      CVE-2024-50272 CVE-2024-50273 CVE-2024-50276 CVE-2024-50278                      CVE-2024-50279 CVE-2024-50280 CVE-2024-50282 CVE-2024-50283                      CVE-2024-50284 CVE-2024-50286 CVE-2024-50287 CVE-2024-50290                      CVE-2024-50292 CVE-2024-50295 CVE-2024-50296 CVE-2024-50299                      CVE-2024-50301 CVE-2024-50302 CVE-2024-53042 CVE-2024-53043                      CVE-2024-53052 CVE-2024-53054 CVE-2024-53055 CVE-2024-53057                      CVE-2024-53058 CVE-2024-53059 CVE-2024-53060 CVE-2024-53061                      CVE-2024-53063 CVE-2024-53066 CVE-2024-53070 CVE-2024-53072                      CVE-2024-53081 CVE-2024-53082 CVE-2024-53088 CVE-2024-53093

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For the stable distribution (bookworm), these problems have been fixed in     version 6.1.119-1.

    We recommend that you upgrade your linux packages.

    For the detailed security status of linux please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/linux

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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CVE-2024-50252

medium

Tenable Plugins

high