{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-50035", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "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" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "30d91a478d58" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.57", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.12-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b" }, { "url": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76" }, { "url": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314" }, { "url": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff" }, { "url": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2" }, { "url": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }