{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "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" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ppp/ppp_async.c" ], "versions": [ { "version": "1da177e4c3f4", "lessThan": "30d91a478d58", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "fadf8fdb3110", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "ce249a4c68d0", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "8fe992ff3df4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "c007a1479724", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "40dddd4b8bd0", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ppp/ppp_async.c" ], "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" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/30d91a478d58cbae3dbaa8224d17d0d839f0d71b" }, { "url": "https://git.kernel.org/stable/c/fadf8fdb3110d3138e05c3765f645535434f8d76" }, { "url": "https://git.kernel.org/stable/c/ce249a4c68d0ce27a8c5d853338d502e2711a314" }, { "url": "https://git.kernel.org/stable/c/8fe992ff3df493d1949922ca234419f3ede08dff" }, { "url": "https://git.kernel.org/stable/c/c007a14797240607038bd3464501109f408940e2" }, { "url": "https://git.kernel.org/stable/c/40dddd4b8bd08a69471efd96107a4e1c73fabefc" } ], "title": "ppp: fix ppp_async_encode() illegal access", "x_generator": { "engine": "bippy-c9c4e1df01b2" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2024-50035", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }