{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50073", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.407Z", "datePublished": "2025-06-18T11:02:17.468Z", "dateUpdated": "2026-08-12T18:18:24.750Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-01T16:03:56.211Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tap: NULL pointer derefence in dev_parse_header_protocol when skb->dev is null\n\nFixes a NULL pointer derefence bug triggered from tap driver.\nWhen tap_get_user calls virtio_net_hdr_to_skb the skb->dev is null\n(in tap.c skb->dev is set after the call to virtio_net_hdr_to_skb)\nvirtio_net_hdr_to_skb calls dev_parse_header_protocol which\nneeds skb->dev field to be valid.\n\nThe line that trigers the bug is in dev_parse_header_protocol\n(dev is at offset 0x10 from skb and is stored in RAX register)\n if (!dev->header_ops || !dev->header_ops->parse_protocol)\n 22e1: mov 0x10(%rbx),%rax\n 22e5:\t mov 0x230(%rax),%rax\n\nSetting skb->dev before the call in tap.c fixes the issue.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000230\nRIP: 0010:virtio_net_hdr_to_skb.constprop.0+0x335/0x410 [tap]\nCode: c0 0f 85 b7 fd ff ff eb d4 41 39 c6 77 cf 29 c6 48 89 df 44 01 f6 e8 7a 79 83 c1 48 85 c0 0f 85 d9 fd ff ff eb b7 48 8b 43 10 <48> 8b 80 30 02 00 00 48 85 c0 74 55 48 8b 40 28 48 85 c0 74 4c 48\nRSP: 0018:ffffc90005c27c38 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff888298f25300 RCX: 0000000000000010\nRDX: 0000000000000005 RSI: ffffc90005c27cb6 RDI: ffff888298f25300\nRBP: ffffc90005c27c80 R08: 00000000ffffffea R09: 00000000000007e8\nR10: ffff88858ec77458 R11: 0000000000000000 R12: 0000000000000001\nR13: 0000000000000014 R14: ffffc90005c27e08 R15: ffffc90005c27cb6\nFS: 0000000000000000(0000) GS:ffff88858ec40000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000230 CR3: 0000000281408006 CR4: 00000000003706e0\nCall Trace:\n tap_get_user+0x3f1/0x540 [tap]\n tap_sendmsg+0x56/0x362 [tap]\n ? get_tx_bufs+0xc2/0x1e0 [vhost_net]\n handle_tx_copy+0x114/0x670 [vhost_net]\n handle_tx+0xb0/0xe0 [vhost_net]\n handle_tx_kick+0x15/0x20 [vhost_net]\n vhost_worker+0x7b/0xc0 [vhost]\n ? vhost_vring_call_reset+0x40/0x40 [vhost]\n kthread+0xfa/0x120\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/tap.c" ], "versions": [ { "version": "faa3baa2828c5e1c4374f3e60041f75c64f5fcb6", "lessThan": "8f90163f9e013c8fc791aab338aab44a46044cfc", "status": "affected", "versionType": "git" }, { "version": "924a9bc362a5223cd448ca08c3dde21235adc310", "lessThan": "447ba770cfe798925f4923548b367fd49f0ee5f0", "status": "affected", "versionType": "git" }, { "version": "924a9bc362a5223cd448ca08c3dde21235adc310", "lessThan": "dd29648fcf69339713f2d25f7014ae905dcdfc18", "status": "affected", "versionType": "git" }, { "version": "924a9bc362a5223cd448ca08c3dde21235adc310", "lessThan": "4f61f133f354853bc394ec7d6028adb9b02dd701", "status": "affected", "versionType": "git" }, { "version": "ea3fb2ce5fa794d02135f5c079e05cd6fc3f545d", "status": "affected", "versionType": "git" }, { "version": "54ef8243c3c8e90f1ea5792e6752e021a25c8eb3", "status": "affected", "versionType": "git" }, { "version": "ca278267d6cd9544645731732455b6b20cb0e895", "status": "affected", "versionType": "git" }, { "version": "99b1d3f74b9ef72c2f74c8e4c078e1bc0706e748", "status": "affected", "versionType": "git" }, { "version": "5.10.24", "lessThan": "5.10.258", "status": "affected", "versionType": "semver" }, { "version": "4.14.226", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.181", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.4.106", "lessThan": "5.5", "status": "affected", "versionType": "semver" }, { "version": "5.11.7", "lessThan": "5.12", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/tap.c" ], "versions": [ { "version": "5.12", "status": "affected" }, { "version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.4", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "5.10.24", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.19.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.0" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.181" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.106" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11.7" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8f90163f9e013c8fc791aab338aab44a46044cfc" }, { "url": "https://git.kernel.org/stable/c/447ba770cfe798925f4923548b367fd49f0ee5f0" }, { "url": "https://git.kernel.org/stable/c/dd29648fcf69339713f2d25f7014ae905dcdfc18" }, { "url": "https://git.kernel.org/stable/c/4f61f133f354853bc394ec7d6028adb9b02dd701" } ], "title": "net: tap: NULL pointer derefence in dev_parse_header_protocol when skb->dev is null", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "http://www.openwall.com/lists/oss-security/2026/08/12/20" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-08-12T18:18:24.750Z" } } ] } }