{"schema_version":"1.9.0","id":"CVE-2024-56643","published":"2024-12-27T15:02:44.492Z","modified":"2026-08-12T03:51:26.846160208Z","related":["SUSE-SU-2025:0289-1","SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:0565-1","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1","USN-7379-2","USN-7380-1"],"summary":"dccp: Fix memory leak in dccp_feat_change_recv","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndccp: Fix memory leak in dccp_feat_change_recv\n\nIf dccp_feat_push_confirm() fails after new value for SP feature was accepted\nwithout reconciliation ('entry == NULL' branch), memory allocated for that value\nwith dccp_feat_clone_sp_val() is never freed.\n\nHere is the kmemleak stack for this:\n\nunreferenced object 0xffff88801d4ab488 (size 8):\n  comm \"syz-executor310\", pid 1127, jiffies 4295085598 (age 41.666s)\n  hex dump (first 8 bytes):\n    01 b4 4a 1d 80 88 ff ff                          ..J.....\n  backtrace:\n    [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128\n    [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline]\n    [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline]\n    [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline]\n    [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline]\n    [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416\n    [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125\n    [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650\n    [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688\n    [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline]\n    [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570\n    [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111\n    [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline]\n    [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696\n    [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735\n    [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865\n    [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882\n    [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline]\n    [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline]\n    [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889\n    [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46\n    [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nClean up the allocated memory in case of dccp_feat_push_confirm() failure\nand bail out with an error reset code.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e77b8363b2ea7c0d89919547c1a8b0562f298b57"},{"fixed":"623be080ab3c13d71570bd32f7202a8efa8e2252"},{"fixed":"c99507fff94b926fc92279c92d80f229c91cb85d"},{"fixed":"bc3d4423def1a9412a0ae454cb4477089ab79276"},{"fixed":"6ff67909ee2ffad911e3122616df41dee23ff4f6"},{"fixed":"d3ec686a369fae5034303061f003cd3f94ddfd23"},{"fixed":"9ee68b0f23706a77f53c832457b9384178b76421"},{"fixed":"22be4727a8f898442066bcac34f8a1ad0bc72e14"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56643.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.29"},{"fixed":"5.4.287"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.231"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.174"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.66"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56643.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0bc72e14"},{"type":"WEB","url":"https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56643.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56643"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56643.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}