{"id":"CVE-2022-49865","url":"https://www.cyber-defence.io/tools/cve/CVE-2022-49865","generatedAt":"2026-10-27T20:40:23.174Z","title":"In the Linux kernel, the following vulnerability has been resolved: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved remained uninitialized, resulting in a…","description":"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, 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.","published":"2025-05-01T15:16:11.000Z","lastModified":"2026-06-17T05:19:21.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"},"cwe":["CWE-909"],"affected":["linux/linux kernel"],"epss":{"score":0.00223,"percentile":0.1284,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-49865","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}