{"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":"2025-05-04T08:55:39.291Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T08:55:39.291Z"},"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 <f3> 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 <NMI>\n </NMI>\n <TASK>\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 </TASK>"}],"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":"36f7371de977f805750748e80279be7e370df85c","lessThan":"6c480d0f131862645d172ca9e25dc152b1a5c3a6","status":"affected","versionType":"git"},{"version":"2a3d40b4025fcfe51b04924979f1653993b17669","lessThan":"c4c795b21dd23d9514ae1c6646c3fb2c78b5be60","status":"affected","versionType":"git"},{"version":"69e0f04460f4037e01e29f0d9675544f62aafca3","lessThan":"e9eac260369d0cf57ea53df95427125725507a0d","status":"affected","versionType":"git"},{"version":"cb8890318dde26fc89c6ea67d6e9070ab50b6e91","lessThan":"43ba9e331559a30000c862eea313248707afa787","status":"affected","versionType":"git"},{"version":"25236c91b5ab4a26a56ba2e79b8060cf4e047839","lessThan":"aa82ac51d63328714645c827775d64dbfd9941f3","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":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.149","versionEndExcluding":"5.15.151"}]}]}],"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-1.2.0"}},"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"}}]}}