| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: netlink: af_netlink: Prevent empty skb by adding a check on len.\n\nAdding a check on len parameter to avoid empty skb. This prevents a\ndivision error in netem_enqueue function which is caused when skb->len=0\nand skb->data_len=0 in the randomized corruption step as shown below.\n\nskb->data[prandom_u32() % skb_headlen(skb)] ^= 1<<(prandom_u32() % 8);\n\nCrash Report:\n[ 343.170349] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family\n0 port 6081 - 0\n[ 343.216110] netem: version 1.3\n[ 343.235841] divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ 343.236680] CPU: 3 PID: 4288 Comm: reproducer Not tainted 5.16.0-rc1+\n[ 343.237569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS 1.11.0-2.el7 04/01/2014\n[ 343.238707] RIP: 0010:netem_enqueue+0x1590/0x33c0 [sch_netem]\n[ 343.239499] Code: 89 85 58 ff ff ff e8 5f 5d e9 d3 48 8b b5 48 ff ff\nff 8b 8d 50 ff ff ff 8b 85 58 ff ff ff 48 8b bd 70 ff ff ff 31 d2 2b 4f\n74 <f7> f1 48 b8 00 00 00 00 00 fc ff df 49 01 d5 4c 89 e9 48 c1 e9 03\n[ 343.241883] RSP: 0018:ffff88800bcd7368 EFLAGS: 00010246\n[ 343.242589] RAX: 00000000ba7c0a9c RBX: 0000000000000001 RCX:\n0000000000000000\n[ 343.243542] RDX: 0000000000000000 RSI: ffff88800f8edb10 RDI:\nffff88800f8eda40\n[ 343.244474] RBP: ffff88800bcd7458 R08: 0000000000000000 R09:\nffffffff94fb8445\n[ 343.245403] R10: ffffffff94fb8336 R11: ffffffff94fb8445 R12:\n0000000000000000\n[ 343.246355] R13: ffff88800a5a7000 R14: ffff88800a5b5800 R15:\n0000000000000020\n[ 343.247291] FS: 00007fdde2bd7700(0000) GS:ffff888109780000(0000)\nknlGS:0000000000000000\n[ 343.248350] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 343.249120] CR2: 00000000200000c0 CR3: 000000000ef4c000 CR4:\n00000000000006e0\n[ 343.250076] Call Trace:\n[ 343.250423] <TASK>\n[ 343.250713] ? memcpy+0x4d/0x60\n[ 343.251162] ? netem_init+0xa0/0xa0 [sch_netem]\n[ 343.251795] ? __sanitizer_cov_trace_pc+0x21/0x60\n[ 343.252443] netem_enqueue+0xe28/0x33c0 [sch_netem]\n[ 343.253102] ? stack_trace_save+0x87/0xb0\n[ 343.253655] ? filter_irq_stacks+0xb0/0xb0\n[ 343.254220] ? netem_init+0xa0/0xa0 [sch_netem]\n[ 343.254837] ? __kasan_check_write+0x14/0x20\n[ 343.255418] ? _raw_spin_lock+0x88/0xd6\n[ 343.255953] dev_qdisc_enqueue+0x50/0x180\n[ 343.256508] __dev_queue_xmit+0x1a7e/0x3090\n[ 343.257083] ? netdev_core_pick_tx+0x300/0x300\n[ 343.257690] ? check_kcov_mode+0x10/0x40\n[ 343.258219] ? _raw_spin_unlock_irqrestore+0x29/0x40\n[ 343.258899] ? __kasan_init_slab_obj+0x24/0x30\n[ 343.259529] ? setup_object.isra.71+0x23/0x90\n[ 343.260121] ? new_slab+0x26e/0x4b0\n[ 343.260609] ? kasan_poison+0x3a/0x50\n[ 343.261118] ? kasan_unpoison+0x28/0x50\n[ 343.261637] ? __kasan_slab_alloc+0x71/0x90\n[ 343.262214] ? memcpy+0x4d/0x60\n[ 343.262674] ? write_comp_data+0x2f/0x90\n[ 343.263209] ? __kasan_check_write+0x14/0x20\n[ 343.263802] ? __skb_clone+0x5d6/0x840\n[ 343.264329] ? __sanitizer_cov_trace_pc+0x21/0x60\n[ 343.264958] dev_queue_xmit+0x1c/0x20\n[ 343.265470] netlink_deliver_tap+0x652/0x9c0\n[ 343.266067] netlink_unicast+0x5a0/0x7f0\n[ 343.266608] ? netlink_attachskb+0x860/0x860\n[ 343.267183] ? __sanitizer_cov_trace_pc+0x21/0x60\n[ 343.267820] ? write_comp_data+0x2f/0x90\n[ 343.268367] netlink_sendmsg+0x922/0xe80\n[ 343.268899] ? netlink_unicast+0x7f0/0x7f0\n[ 343.269472] ? __sanitizer_cov_trace_pc+0x21/0x60\n[ 343.270099] ? write_comp_data+0x2f/0x90\n[ 343.270644] ? netlink_unicast+0x7f0/0x7f0\n[ 343.271210] sock_sendmsg+0x155/0x190\n[ 343.271721] ____sys_sendmsg+0x75f/0x8f0\n[ 343.272262] ? kernel_sendmsg+0x60/0x60\n[ 343.272788] ? write_comp_data+0x2f/0x90\n[ 343.273332] ? write_comp_data+0x2f/0x90\n[ 343.273869] ___sys_sendmsg+0x10f/0x190\n[ 343.274405] ? sendmsg_copy_msghdr+0x80/0x80\n[ 343.274984] ? slab_post_alloc_hook+0x70/0x230\n[ 343.275597] ? futex_wait_setup+0x240/0x240\n[ 343.276175] ? security_file_alloc+0x3e/0x170\n[ 343.276779] ? write_comp_d\n---truncated---" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/netlink/af_netlink.c" |
| ], |
| "versions": [ |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "c54a60c8fbaa774f828e26df79f66229a8a0e010", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "40cf2e058832d9cfaae98dfd77334926275598b6", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "54e785f7d5c197bc06dbb8053700df7e2a093ced", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "ff3f517bf7138e01a17369042908a3f345c0ee41", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "c0315e93552e0d840e9edc6abd71c7db82ec8f51", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "dadce61247c6230489527cc5e343b6002d1114c5", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "4c986072a8c9249b9398c7a18f216dc26a9f0e35", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", |
| "lessThan": "f123cffdd8fe8ea6c7fded4b88516a42798797d0", |
| "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/netlink/af_netlink.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.4.296", |
| "lessThanOrEqual": "4.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.9.294", |
| "lessThanOrEqual": "4.9.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.259", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.222", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.167", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.87", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.10", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.16", |
| "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:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "4.4.296" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "4.9.294" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "4.14.259" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "4.19.222" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.4.167" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.10.87" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.15.10" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionEndExcluding": "5.16" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/c54a60c8fbaa774f828e26df79f66229a8a0e010" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/40cf2e058832d9cfaae98dfd77334926275598b6" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/54e785f7d5c197bc06dbb8053700df7e2a093ced" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ff3f517bf7138e01a17369042908a3f345c0ee41" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/c0315e93552e0d840e9edc6abd71c7db82ec8f51" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/dadce61247c6230489527cc5e343b6002d1114c5" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4c986072a8c9249b9398c7a18f216dc26a9f0e35" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/f123cffdd8fe8ea6c7fded4b88516a42798797d0" |
| } |
| ], |
| "title": "net: netlink: af_netlink: Prevent empty skb by adding a check on len.", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47606", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
