| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Don't return OOB skb in manage_oob().\n\nsyzbot reported use-after-free in unix_stream_recv_urg(). [0]\n\nThe scenario is\n\n 1. send(MSG_OOB)\n 2. recv(MSG_OOB)\n -> The consumed OOB remains in recv queue\n 3. send(MSG_OOB)\n 4. recv()\n -> manage_oob() returns the next skb of the consumed OOB\n -> This is also OOB, but unix_sk(sk)->oob_skb is not cleared\n 5. recv(MSG_OOB)\n -> unix_sk(sk)->oob_skb is used but already freed\n\nThe recent commit 8594d9b85c07 (\"af_unix: Don't call skb_get() for OOB\nskb.\") uncovered the issue.\n\nIf the OOB skb is consumed and the next skb is peeked in manage_oob(),\nwe still need to check if the skb is OOB.\n\nLet's do so by falling back to the following checks in manage_oob()\nand add the test case in selftest.\n\nNote that we need to add a similar check for SIOCATMARK.\n\n[0]:\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa6/0xb0 net/unix/af_unix.c:2959\nRead of size 4 at addr ffff8880326abcc4 by task syz-executor178/5235\n\nCPU: 0 UID: 0 PID: 5235 Comm: syz-executor178 Not tainted 6.11.0-rc5-syzkaller-00742-gfbdaffe41adc #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n unix_stream_read_actor+0xa6/0xb0 net/unix/af_unix.c:2959\n unix_stream_recv_urg+0x1df/0x320 net/unix/af_unix.c:2640\n unix_stream_read_generic+0x2456/0x2520 net/unix/af_unix.c:2778\n unix_stream_recvmsg+0x22b/0x2c0 net/unix/af_unix.c:2996\n sock_recvmsg_nosec net/socket.c:1046 [inline]\n sock_recvmsg+0x22f/0x280 net/socket.c:1068\n ____sys_recvmsg+0x1db/0x470 net/socket.c:2816\n ___sys_recvmsg net/socket.c:2858 [inline]\n __sys_recvmsg+0x2f0/0x3e0 net/socket.c:2888\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f5360d6b4e9\nCode: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fff29b3a458 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\nRAX: ffffffffffffffda RBX: 00007fff29b3a638 RCX: 00007f5360d6b4e9\nRDX: 0000000000002001 RSI: 0000000020000640 RDI: 0000000000000003\nRBP: 00007f5360dde610 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007fff29b3a628 R14: 0000000000000001 R15: 0000000000000001\n </TASK>\n\nAllocated by task 5235:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n unpoison_slab_object mm/kasan/common.c:312 [inline]\n __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338\n kasan_slab_alloc include/linux/kasan.h:201 [inline]\n slab_post_alloc_hook mm/slub.c:3988 [inline]\n slab_alloc_node mm/slub.c:4037 [inline]\n kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4080\n __alloc_skb+0x1c3/0x440 net/core/skbuff.c:667\n alloc_skb include/linux/skbuff.h:1320 [inline]\n alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6528\n sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2815\n sock_alloc_send_skb include/net/sock.h:1778 [inline]\n queue_oob+0x108/0x680 net/unix/af_unix.c:2198\n unix_stream_sendmsg+0xd24/0xf80 net/unix/af_unix.c:2351\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x221/0x270 net/socket.c:745\n ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597\n ___sys_sendmsg net/socket.c:2651 [inline]\n __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFreed by task 5235:\n kasan_save_stack mm/kasan/common.c:47\n---truncated---" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/unix/af_unix.c", |
| "tools/testing/selftests/net/af_unix/msg_oob.c" |
| ], |
| "versions": [ |
| { |
| "version": "93c99f21db360957d49853e5666b5c147f593bda", |
| "lessThan": "4a7f9a2591a923bdde4bd7eac33490b6ae3b257c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "93c99f21db360957d49853e5666b5c147f593bda", |
| "lessThan": "5aa57d9f2d5311f19434d95b2a81610aa263e23b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "71f8d9a4f6e094bae951765d1d18b44827013001", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/unix/af_unix.c", |
| "tools/testing/selftests/net/af_unix/msg_oob.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.10", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.10", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.11.2", |
| "lessThanOrEqual": "6.11.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.11.2" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10", |
| "versionEndExcluding": "6.12" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.9.8" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/4a7f9a2591a923bdde4bd7eac33490b6ae3b257c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/5aa57d9f2d5311f19434d95b2a81610aa263e23b" |
| } |
| ], |
| "title": "af_unix: Don't return OOB skb in manage_oob().", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-47711", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
