{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2024-26750", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.169Z", "datePublished": "2024-04-04T08:20:14.494Z", "dateUpdated": "2024-09-11T17:33:53.425Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:22:04.520Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Drop oob_skb ref before purging queue in GC.\n\nsyzbot reported another task hung in __unix_gc(). [0]\n\nThe current while loop assumes that all of the left candidates\nhave oob_skb and calling kfree_skb(oob_skb) releases the remaining\ncandidates.\n\nHowever, I missed a case that oob_skb has self-referencing fd and\nanother fd and the latter sk is placed before the former in the\ncandidate list. Then, the while loop never proceeds, resulting\nthe task hung.\n\n__unix_gc() has the same loop just before purging the collected skb,\nso we can call kfree_skb(oob_skb) there and let __skb_queue_purge()\nrelease all inflight sockets.\n\n[0]:\nSending NMI from CPU 0 to CPUs 1:\nNMI backtrace for cpu 1\nCPU: 1 PID: 2784 Comm: kworker/u4:8 Not tainted 6.8.0-rc4-syzkaller-01028-g71b605d32017 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nWorkqueue: events_unbound __unix_gc\nRIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200\nCode: 89 fb e8 23 00 00 00 48 8b 3d 84 f5 1a 0c 48 89 de 5b e9 43 26 57 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0d 90 52 70 7e 65 8b 15 91 52 70\nRSP: 0018:ffffc9000a17fa78 EFLAGS: 00000287\nRAX: ffffffff8a0a6108 RBX: ffff88802b6c2640 RCX: ffff88802c0b3b80\nRDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000\nRBP: ffffc9000a17fbf0 R08: ffffffff89383f1d R09: 1ffff1100ee5ff84\nR10: dffffc0000000000 R11: ffffed100ee5ff85 R12: 1ffff110056d84ee\nR13: ffffc9000a17fae0 R14: 0000000000000000 R15: ffffffff8f47b840\nFS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007ffef5687ff8 CR3: 0000000029b34000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n \n \n __unix_gc+0xe69/0xf40 net/unix/garbage.c:343\n process_one_work kernel/workqueue.c:2633 [inline]\n process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706\n worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787\n kthread+0x2ef/0x390 kernel/kthread.c:388\n ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242\n " } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/unix/garbage.c" ], "versions": [ { "version": "36f7371de977", "lessThan": "6c480d0f1318", "status": "affected", "versionType": "git" }, { "version": "2a3d40b4025f", "lessThan": "c4c795b21dd2", "status": "affected", "versionType": "git" }, { "version": "69e0f04460f4", "lessThan": "e9eac260369d", "status": "affected", "versionType": "git" }, { "version": "cb8890318dde", "lessThan": "43ba9e331559", "status": "affected", "versionType": "git" }, { "version": "25236c91b5ab", "lessThan": "aa82ac51d633", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/unix/garbage.c" ], "versions": [ { "version": "5.15.149", "lessThan": "5.15.151", "status": "affected", "versionType": "custom" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6c480d0f131862645d172ca9e25dc152b1a5c3a6" }, { "url": "https://git.kernel.org/stable/c/c4c795b21dd23d9514ae1c6646c3fb2c78b5be60" }, { "url": "https://git.kernel.org/stable/c/e9eac260369d0cf57ea53df95427125725507a0d" }, { "url": "https://git.kernel.org/stable/c/43ba9e331559a30000c862eea313248707afa787" }, { "url": "https://git.kernel.org/stable/c/aa82ac51d63328714645c827775d64dbfd9941f3" } ], "title": "af_unix: Drop oob_skb ref before purging queue in GC.", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.217Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/6c480d0f131862645d172ca9e25dc152b1a5c3a6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c4c795b21dd23d9514ae1c6646c3fb2c78b5be60", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e9eac260369d0cf57ea53df95427125725507a0d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/43ba9e331559a30000c862eea313248707afa787", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/aa82ac51d63328714645c827775d64dbfd9941f3", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26750", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:51:11.547250Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:53.425Z" } } ] } }