{"id":"CVE-2024-50035","revision":"306a12de2adc48c0ad390cc5a1c67d98","records":[{"revision":"306a12de2adc48c0ad390cc5a1c67d98","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-50035","aliases":[],"title":"ppp: fix ppp_async_encode() illegal access","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nppp: fix ppp_async_encode() illegal access\n\nsyzbot reported an issue in ppp_async_encode() [1]\n\nIn this case, pppoe_sendmsg() is called with a zero size.\nThen ppp_async_encode() is called with an empty skb.\n\nBUG: KMSAN: uninit-value in ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n BUG: KMSAN: uninit-value in ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n  ppp_async_encode drivers/net/ppp/ppp_async.c:545 [inline]\n  ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675\n  ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634\n  ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [inline]\n  ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304\n  pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379\n  sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113\n  __release_sock+0x1da/0x330 net/core/sock.c:3072\n  release_sock+0x6b/0x250 net/core/sock.c:3626\n  pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903\n  sock_sendmsg_nosec net/socket.c:729 [inline]\n  __sock_sendmsg+0x30f/0x380 net/socket.c:744\n  ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n  __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n  __do_sys_sendmmsg net/socket.c:2771 [inline]\n  __se_sys_sendmmsg net/socket.c:2768 [inline]\n  __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n  x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n  slab_post_alloc_hook mm/slub.c:4092 [inline]\n  slab_alloc_node mm/slub.c:4135 [inline]\n  kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587\n  __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678\n  alloc_skb include/linux/skbuff.h:1322 [inline]\n  sock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732\n  pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867\n  sock_sendmsg_nosec net/socket.c:729 [inline]\n  __sock_sendmsg+0x30f/0x380 net/socket.c:744\n  ____sys_sendmsg+0x903/0xb60 net/socket.c:2602\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656\n  __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742\n  __do_sys_sendmmsg net/socket.c:2771 [inline]\n  __se_sys_sendmmsg net/socket.c:2768 [inline]\n  __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768\n  x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nCPU: 1 UID: 0 PID: 5411 Comm: syz.1.14 Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024","state":0,"publishedAt":"2024-10-21T19:39:36.46+00:00","modifiedAt":"2026-10-15T00:56:23.724+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ppp/ppp_async.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"4151ec65abd755133ebec687218fadd2d2631167\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"8dfe93901b410ae41264087427f3b9f389388f83\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"30d91a478d58cbae3dbaa8224d17d0d839f0d71b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"fadf8fdb3110d3138e05c3765f645535434f8d76\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"ce249a4c68d0ce27a8c5d853338d502e2711a314\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"8fe992ff3df493d1949922ca234419f3ede08dff\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"c007a14797240607038bd3464501109f408940e2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n                            \"lessThan\": \"40dddd4b8bd08a69471efd96107a4e1c73fabefc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ppp/ppp_async.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.323\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.285\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.227\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.168\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.113\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.57\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.11.4\",\n                            \"lessThanOrEqual\": \"6.11.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/4151ec65abd755133ebec687218fadd2d2631167","https://git.kernel.org/stable/c/8dfe93901b410ae41264087427f3b9f389388f83","https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b","https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76","https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314","https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff","https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2","https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-50035","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-50035","identifiers":["CVE-2024-50035"]},"retained":false,"historicalAffected":[]}],"coverage":[]}