{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module\n\nHi,\n\nWhen testing install and uninstall of ipmi_si.ko and ipmi_msghandler.ko,\nthe system crashed.\n\nThe log as follows:\n[ 141.087026] BUG: unable to handle kernel paging request at ffffffffc09b3a5a\n[ 141.087241] PGD 8fe4c0d067 P4D 8fe4c0d067 PUD 8fe4c0f067 PMD 103ad89067 PTE 0\n[ 141.087464] Oops: 0010 [#1] SMP NOPTI\n[ 141.087580] CPU: 67 PID: 668 Comm: kworker/67:1 Kdump: loaded Not tainted 4.18.0.x86_64 #47\n[ 141.088009] Workqueue: events 0xffffffffc09b3a40\n[ 141.088009] RIP: 0010:0xffffffffc09b3a5a\n[ 141.088009] Code: Bad RIP value.\n[ 141.088009] RSP: 0018:ffffb9094e2c3e88 EFLAGS: 00010246\n[ 141.088009] RAX: 0000000000000000 RBX: ffff9abfdb1f04a0 RCX: 0000000000000000\n[ 141.088009] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\n[ 141.088009] RBP: 0000000000000000 R08: ffff9abfffee3cb8 R09: 00000000000002e1\n[ 141.088009] R10: ffffb9094cb73d90 R11: 00000000000f4240 R12: ffff9abfffee8700\n[ 141.088009] R13: 0000000000000000 R14: ffff9abfdb1f04a0 R15: ffff9abfdb1f04a8\n[ 141.088009] FS: 0000000000000000(0000) GS:ffff9abfffec0000(0000) knlGS:0000000000000000\n[ 141.088009] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 141.088009] CR2: ffffffffc09b3a30 CR3: 0000008fe4c0a001 CR4: 00000000007606e0\n[ 141.088009] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 141.088009] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 141.088009] PKRU: 55555554\n[ 141.088009] Call Trace:\n[ 141.088009] ? process_one_work+0x195/0x390\n[ 141.088009] ? worker_thread+0x30/0x390\n[ 141.088009] ? process_one_work+0x390/0x390\n[ 141.088009] ? kthread+0x10d/0x130\n[ 141.088009] ? kthread_flush_work_fn+0x10/0x10\n[ 141.088009] ? ret_from_fork+0x35/0x40] BUG: unable to handle kernel paging request at ffffffffc0b28a5a\n[ 200.223240] PGD 97fe00d067 P4D 97fe00d067 PUD 97fe00f067 PMD a580cbf067 PTE 0\n[ 200.223464] Oops: 0010 [#1] SMP NOPTI\n[ 200.223579] CPU: 63 PID: 664 Comm: kworker/63:1 Kdump: loaded Not tainted 4.18.0.x86_64 #46\n[ 200.224008] Workqueue: events 0xffffffffc0b28a40\n[ 200.224008] RIP: 0010:0xffffffffc0b28a5a\n[ 200.224008] Code: Bad RIP value.\n[ 200.224008] RSP: 0018:ffffbf3c8e2a3e88 EFLAGS: 00010246\n[ 200.224008] RAX: 0000000000000000 RBX: ffffa0799ad6bca0 RCX: 0000000000000000\n[ 200.224008] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246\n[ 200.224008] RBP: 0000000000000000 R08: ffff9fe43fde3cb8 R09: 00000000000000d5\n[ 200.224008] R10: ffffbf3c8cb53d90 R11: 00000000000f4240 R12: ffff9fe43fde8700\n[ 200.224008] R13: 0000000000000000 R14: ffffa0799ad6bca0 R15: ffffa0799ad6bca8\n[ 200.224008] FS: 0000000000000000(0000) GS:ffff9fe43fdc0000(0000) knlGS:0000000000000000\n[ 200.224008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 200.224008] CR2: ffffffffc0b28a30 CR3: 00000097fe00a002 CR4: 00000000007606e0\n[ 200.224008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 200.224008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 200.224008] PKRU: 55555554\n[ 200.224008] Call Trace:\n[ 200.224008] ? process_one_work+0x195/0x390\n[ 200.224008] ? worker_thread+0x30/0x390\n[ 200.224008] ? process_one_work+0x390/0x390\n[ 200.224008] ? kthread+0x10d/0x130\n[ 200.224008] ? kthread_flush_work_fn+0x10/0x10\n[ 200.224008] ? ret_from_fork+0x35/0x40\n[ 200.224008] kernel fault(0x1) notification starting on CPU 63\n[ 200.224008] kernel fault(0x1) notification finished on CPU 63\n[ 200.224008] CR2: ffffffffc0b28a5a\n[ 200.224008] ---[ end trace c82a412d93f57412 ]---\n\nThe reason is as follows:\nT1: rmmod ipmi_si.\n ->ipmi_unregister_smi()\n -> ipmi_bmc_unregister()\n -> __ipmi_bmc_unregister()\n -> kref_put(&bmc->usecount, cleanup_bmc_device);\n -> schedule_work(&bmc->remove_work);\n\nT2: rmmod ipmi_msghandl\n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/char/ipmi/ipmi_msghandler.c" ], "versions": [ { "version": "b2cfd8ab4add", "lessThan": "925229d55272", "status": "affected", "versionType": "git" }, { "version": "b2cfd8ab4add", "lessThan": "992649b8b168", "status": "affected", "versionType": "git" }, { "version": "b2cfd8ab4add", "lessThan": "6809da518514", "status": "affected", "versionType": "git" }, { "version": "b2cfd8ab4add", "lessThan": "6b3f7e4b10f3", "status": "affected", "versionType": "git" }, { "version": "b2cfd8ab4add", "lessThan": "ffb76a86f809", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/char/ipmi/ipmi_msghandler.c" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.223", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.169", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.89", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.12", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/925229d552724e1bba1abf01d3a0b1318539b012" }, { "url": "https://git.kernel.org/stable/c/992649b8b16843d27eb39ceea5f9cf85ffb50a18" }, { "url": "https://git.kernel.org/stable/c/6809da5185141e61401da5b01896b79a4deed1ad" }, { "url": "https://git.kernel.org/stable/c/6b3f7e4b10f343f05b5fb513b07a9168fbf1172e" }, { "url": "https://git.kernel.org/stable/c/ffb76a86f8096a8206be03b14adda6092e18e275" } ], "title": "ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module", "x_generator": { "engine": "bippy-a5840b7849dd" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2021-47100", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }