{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53863", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53863", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-12-09T01:30:32.109Z", "updatedAt": "2026-05-11T19:52:58.716Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "netlink: do not hard code device address lenth in fdb dumps", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: do not hard code device address lenth in fdb dumps\n\nsyzbot reports that some netdev devices do not have a six bytes\naddress [1]\n\nReplace ETH_ALEN by dev->addr_len.\n\n[1] (Case of a device where dev->addr_len = 4)\n\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak in copyout+0xb8/0x100 lib/iov_iter.c:169\ninstrument_copy_to_user include/linux/instrumented.h:114 [inline]\ncopyout+0xb8/0x100 lib/iov_iter.c:169\n_copy_to_iter+0x6d8/0x1d00 lib/iov_iter.c:536\ncopy_to_iter include/linux/uio.h:206 [inline]\nsimple_copy_to_iter+0x68/0xa0 net/core/datagram.c:513\n__skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419\nskb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:527\nskb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\nnetlink_recvmsg+0x4ae/0x15a0 net/netlink/af_netlink.c:1970\nsock_recvmsg_nosec net/socket.c:1019 [inline]\nsock_recvmsg net/socket.c:1040 [inline]\n____sys_recvmsg+0x283/0x7f0 net/socket.c:2722\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\n__sys_recvmmsg net/socket.c:2937 [inline]\n__do_sys_recvmmsg net/socket.c:2960 [inline]\n__se_sys_recvmmsg net/socket.c:2953 [inline]\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was stored to memory at:\n__nla_put lib/nlattr.c:1009 [inline]\nnla_put+0x1c6/0x230 lib/nlattr.c:1067\nnlmsg_populate_fdb_fill+0x2b8/0x600 net/core/rtnetlink.c:4071\nnlmsg_populate_fdb net/core/rtnetlink.c:4418 [inline]\nndo_dflt_fdb_dump+0x616/0x840 net/core/rtnetlink.c:4456\nrtnl_fdb_dump+0x14ff/0x1fc0 net/core/rtnetlink.c:4629\nnetlink_dump+0x9d1/0x1310 net/netlink/af_netlink.c:2268\nnetlink_recvmsg+0xc5c/0x15a0 net/netlink/af_netlink.c:1995\nsock_recvmsg_nosec+0x7a/0x120 net/socket.c:1019\n____sys_recvmsg+0x664/0x7f0 net/socket.c:2720\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\n__sys_recvmmsg net/socket.c:2937 [inline]\n__do_sys_recvmmsg net/socket.c:2960 [inline]\n__se_sys_recvmmsg net/socket.c:2953 [inline]\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\nslab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716\nslab_alloc_node mm/slub.c:3451 [inline]\n__kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490\nkmalloc_trace+0x51/0x200 mm/slab_common.c:1057\nkmalloc include/linux/slab.h:559 [inline]\n__hw_addr_create net/core/dev_addr_lists.c:60 [inline]\n__hw_addr_add_ex+0x2e5/0x9e0 net/core/dev_addr_lists.c:118\n__dev_mc_add net/core/dev_addr_lists.c:867 [inline]\ndev_mc_add+0x9a/0x130 net/core/dev_addr_lists.c:885\nigmp6_group_added+0x267/0xbc0 net/ipv6/mcast.c:680\nipv6_mc_up+0x296/0x3b0 net/ipv6/mcast.c:2754\nipv6_mc_remap+0x1e/0x30 net/ipv6/mcast.c:2708\naddrconf_type_change net/ipv6/addrconf.c:3731 [inline]\naddrconf_notify+0x4d3/0x1d90 net/ipv6/addrconf.c:3699\nnotifier_call_chain kernel/notifier.c:93 [inline]\nraw_notifier_call_chain+0xe4/0x430 kernel/notifier.c:461\ncall_netdevice_notifiers_info net/core/dev.c:1935 [inline]\ncall_netdevice_notifiers_extack net/core/dev.c:1973 [inline]\ncall_netdevice_notifiers+0x1ee/0x2d0 net/core/dev.c:1987\nbond_enslave+0xccd/0x53f0 drivers/net/bonding/bond_main.c:1906\ndo_set_master net/core/rtnetlink.c:2626 [inline]\nrtnl_newlink_create net/core/rtnetlink.c:3460 [inline]\n__rtnl_newlink net/core/rtnetlink.c:3660 [inline]\nrtnl_newlink+0x378c/0x40e0 net/core/rtnetlink.c:3673\nrtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6395\nnetlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546\nrtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6413\nnetlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]\nnetlink_unicast+0xf28/0x1230 net/netlink/af_\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "61d1bf3c34bf5fe936c50d1a4bc460babcc85e88" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "c3ad49ff5c030cbe719fc4cb0ae081b8255ef4b3" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "bd1de6107f10e7d4c2aabe3397b58d63672fc511" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "44db85c6e1a184b99a2cdf56b525ac63c4962c22" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "619384319b137908d1008c92426c9daa95c06b90" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "e9331c8fa4c69f09d2c71682af75586f77266e81" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "b6f2d4618fc697886ad41e215ae20638153e42d0" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "73862118bd9dec850aa8e775145647ddd23aedf8" }, { "version": "d83b060360485454fcd6870340ec01d6f96f2295", "status": "affected", "versionType": "git", "lessThan": "aa5406950726e336c5c9585b09799a734b6e77bf" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.5" }, { "version": "4.14.322", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.291", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.251", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.121", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.39", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.3.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.3.*" }, { "version": "6.4.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }