| { |
| "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: bridge: fix vlan tunnel dst refcnt when egressing\n\nThe egress tunnel code uses dst_clone() and directly sets the result\nwhich is wrong because the entry might have 0 refcnt or be already deleted,\ncausing number of problems. It also triggers the WARN_ON() in dst_hold()[1]\nwhen a refcnt couldn't be taken. Fix it by using dst_hold_safe() and\nchecking if a reference was actually taken before setting the dst.\n\n[1] dmesg WARN_ON log and following refcnt errors\n WARNING: CPU: 5 PID: 38 at include/net/dst.h:230 br_handle_egress_vlan_tunnel+0x10b/0x134 [bridge]\n Modules linked in: 8021q garp mrp bridge stp llc bonding ipv6 virtio_net\n CPU: 5 PID: 38 Comm: ksoftirqd/5 Kdump: loaded Tainted: G W 5.13.0-rc3+ #360\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014\n RIP: 0010:br_handle_egress_vlan_tunnel+0x10b/0x134 [bridge]\n Code: e8 85 bc 01 e1 45 84 f6 74 90 45 31 f6 85 db 48 c7 c7 a0 02 19 a0 41 0f 94 c6 31 c9 31 d2 44 89 f6 e8 64 bc 01 e1 85 db 75 02 <0f> 0b 31 c9 31 d2 44 89 f6 48 c7 c7 70 02 19 a0 e8 4b bc 01 e1 49\n RSP: 0018:ffff8881003d39e8 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffffa01902a0\n RBP: ffff8881040c6700 R08: 0000000000000000 R09: 0000000000000001\n R10: 2ce93d0054fe0d00 R11: 54fe0d00000e0000 R12: ffff888109515000\n R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000401\n FS: 0000000000000000(0000) GS:ffff88822bf40000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f42ba70f030 CR3: 0000000109926000 CR4: 00000000000006e0\n Call Trace:\n br_handle_vlan+0xbc/0xca [bridge]\n __br_forward+0x23/0x164 [bridge]\n deliver_clone+0x41/0x48 [bridge]\n br_handle_frame_finish+0x36f/0x3aa [bridge]\n ? skb_dst+0x2e/0x38 [bridge]\n ? br_handle_ingress_vlan_tunnel+0x3e/0x1c8 [bridge]\n ? br_handle_frame_finish+0x3aa/0x3aa [bridge]\n br_handle_frame+0x2c3/0x377 [bridge]\n ? __skb_pull+0x33/0x51\n ? vlan_do_receive+0x4f/0x36a\n ? br_handle_frame_finish+0x3aa/0x3aa [bridge]\n __netif_receive_skb_core+0x539/0x7c6\n ? __list_del_entry_valid+0x16e/0x1c2\n __netif_receive_skb_list_core+0x6d/0xd6\n netif_receive_skb_list_internal+0x1d9/0x1fa\n gro_normal_list+0x22/0x3e\n dev_gro_receive+0x55b/0x600\n ? detach_buf_split+0x58/0x140\n napi_gro_receive+0x94/0x12e\n virtnet_poll+0x15d/0x315 [virtio_net]\n __napi_poll+0x2c/0x1c9\n net_rx_action+0xe6/0x1fb\n __do_softirq+0x115/0x2d8\n run_ksoftirqd+0x18/0x20\n smpboot_thread_fn+0x183/0x19c\n ? smpboot_unregister_percpu_thread+0x66/0x66\n kthread+0x10a/0x10f\n ? kthread_mod_delayed_work+0xb6/0xb6\n ret_from_fork+0x22/0x30\n ---[ end trace 49f61b07f775fd2b ]---\n dst_release: dst:00000000c02d677a refcnt:-1\n dst_release underflow" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/bridge/br_vlan_tunnel.c" |
| ], |
| "versions": [ |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "42020f7f37a90d24b9551f5f7eba3f7c7c102968", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "84fc1c944e45ab317e2e70a0e7f76fa2a5e43b6e", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "79855be6445b6592bddb7bd7167083ec8cdbd73f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "fc7fdd8c5c2ad2fe3e297698be9d4dbe4a4e0579", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "25053a8404ba17ca48f5553d487afc1882e9f56c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "11538d039ac6efcf4f1a6c536e1b87cd3668a9fd", |
| "lessThan": "cfc579f9d89af4ada58c69b03bcaa4887840f3b3", |
| "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/bridge/br_vlan_tunnel.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.11", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.11", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.14.238", |
| "lessThanOrEqual": "4.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.196", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.128", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.46", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.13", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13", |
| "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": "4.11", |
| "versionEndExcluding": "4.14.238" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "4.19.196" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "5.4.128" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "5.10.46" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "5.12.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "5.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/42020f7f37a90d24b9551f5f7eba3f7c7c102968" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/84fc1c944e45ab317e2e70a0e7f76fa2a5e43b6e" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/79855be6445b6592bddb7bd7167083ec8cdbd73f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/fc7fdd8c5c2ad2fe3e297698be9d4dbe4a4e0579" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/25053a8404ba17ca48f5553d487afc1882e9f56c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/cfc579f9d89af4ada58c69b03bcaa4887840f3b3" |
| } |
| ], |
| "title": "net: bridge: fix vlan tunnel dst refcnt when egressing", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47222", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
