{"id":"CVE-2022-49865","title":"ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network\n\nWhen copying a `struct ifaddrlblmsg` to the network, __ifal_reserved\nremained uninitialized, …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 568a47ff756f913e8b374c2af9d22cd2c772c744","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 6d26d0587abccb9835382a0b53faa7b9b1cd83e3","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 58cd7fdc8c1e6c7873acc08f190069fed88d1c12","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < a033b86c7f7621fde31f0364af8986f43b44914f","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 2acb2779b147decd300c117683d5a32ce61c75d6","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 49e92ba5ecd7d72ba369dde2ccff738edd028a47","Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < c23fb2c82267638f9d206cb96bb93e1f93ad7828","Linux 2.6.25"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:50:52.329864Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:10.037Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49865","references":[{"url":"https://git.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744"},{"url":"https://git.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf"},{"url":"https://git.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3"},{"url":"https://git.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12"},{"url":"https://git.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914f"},{"url":"https://git.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6"},{"url":"https://git.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47"},{"url":"https://git.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828"}],"tags":["cve.org"],"epss":0.00223,"epssPercentile":0.13035,"ingestedAt":"2026-11-05T22:38:31.621Z","slug":"CVE-2022-49865","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network\n\nWhen copying a `struct ifaddrlblmsg` to the network, __ifal_reserved\nremained uninitialized, resulting in a 1-byte infoleak:\n\n  BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841\n   __netdev_start_xmit ./include/linux/netdevice.h:4841\n   netdev_start_xmit ./include/linux/netdevice.h:4857\n   xmit_one net/core/dev.c:3590\n   dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606\n   __dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256\n   dev_queue_xmit ./include/linux/netdevice.h:3009\n   __netlink_deliver_tap_skb net/netlink/af_netlink.c:307\n   __netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325\n   netlink_deliver_tap net/netlink/af_netlink.c:338\n   __netlink_sendskb net/netlink/af_netlink.c:1263\n   netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272\n   netlink_unicast+0x56d/0xf50 net/netlink/af_netlink.c:1360\n   nlmsg_unicast ./include/net/netlink.h:1061\n   rtnl_unicast+0x5a/0x80 net/core/rtnetlink.c:758\n   ip6addrlbl_get+0xfad/0x10f0 net/ipv6/addrlabel.c:628\n   rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082\n  ...\n  Uninit was created at:\n   slab_post_alloc_hook+0x118/0xb00 mm/slab.h:742\n   slab_alloc_node mm/slub.c:3398\n   __kmem_cache_alloc_node+0x4f2/0x930 mm/slub.c:3437\n   __do_kmalloc_node mm/slab_common.c:954\n   __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975\n   kmalloc_reserve net/core/skbuff.c:437\n   __alloc_skb+0x27a/0xab0 net/core/skbuff.c:509\n   alloc_skb ./include/linux/skbuff.h:1267\n   nlmsg_new ./include/net/netlink.h:964\n   ip6addrlbl_get+0x490/0x10f0 net/ipv6/addrlabel.c:608\n   rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082\n   netlink_rcv_skb+0x299/0x550 net/netlink/af_netlink.c:2540\n   rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6109\n   netlink_unicast_kernel net/netlink/af_netlink.c:1319\n   netlink_unicast+0x9ab/0xf50 net/netlink/af_netlink.c:1345\n   netlink_sendmsg+0xebc/0x10f0 net/netlink/af_netlink.c:1921\n  ...\n\nThis patch ensures that the reserved field is always initialized.\n\n## Affected\n\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 568a47ff756f913e8b374c2af9d22cd2c772c744`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 6d26d0587abccb9835382a0b53faa7b9b1cd83e3`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 58cd7fdc8c1e6c7873acc08f190069fed88d1c12`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < a033b86c7f7621fde31f0364af8986f43b44914f`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 2acb2779b147decd300c117683d5a32ce61c75d6`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < 49e92ba5ecd7d72ba369dde2ccff738edd028a47`\n- `Linux >= 2a8cc6c89039e0530a3335954253b76ed0f9339a < c23fb2c82267638f9d206cb96bb93e1f93ad7828`\n- `Linux 2.6.25`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}