CVE-2021-47284

CVE Details

Release Date:

2024-05-21

Description

In the Linux kernel, the following vulnerability has been resolved:\nisdn: mISDN: netjet: Fix crash in nj_probe:\n'nj_setup' in netjet.c might fail with -EIO and in this case\n'card->irq' is initialized and is bigger than zero. A subsequent call to\n'nj_release' will free the irq that has not been requested.\nFix this bug by deleting the previous assignment to 'card->irq' and just\nkeep the assignment before 'request_irq'.\nThe KASAN's log reveals it:\n[ 3.354615 ] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1826\nfree_irq+0x100/0x480\n[ 3.355112 ] Modules linked in:\n[ 3.355310 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted\n5.13.0-rc1-00144-g25a1298726e #13\n[ 3.355816 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\nrel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014\n[ 3.356552 ] RIP: 0010:free_irq+0x100/0x480\n[ 3.356820 ] Code: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18\n4d 85 f6 75 e3 e8 4f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5\nff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80\n[ 3.358012 ] RSP: 0000:ffffc90000017b48 EFLAGS: 00010082\n[ 3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX:\n0000000000000000\n[ 3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI:\n00000000ffffffff\n[ 3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09:\n0000000000000000\n[ 3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d04 R12:\n0000000000000000\n[ 3.360195 ] R13: ffff888107dc6000 R14: ffff888107dc6928 R15:\nffff888104dc80a8\n[ 3.360652 ] FS: 0000000000000000(0000) GS:ffff88817bc00000(0000)\nknlGS:0000000000000000\n[ 3.361170 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 3.361538 ] CR2: 0000000000000000 CR3: 000000000582e000 CR4:\n00000000000006f0\n[ 3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2:\n0000000000000000\n[ 3.362175 ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:\n0000000000000400\n[ 3.362175 ] Call Trace:\n[ 3.362175 ] nj_release+0x51/0x1e0\n[ 3.362175 ] nj_probe+0x450/0x950\n[ 3.362175 ] ? pci_device_remove+0x110/0x110\n[ 3.362175 ] local_pci_probe+0x45/0xa0\n[ 3.362175 ] pci_device_probe+0x12b/0x1d0\n[ 3.362175 ] really_probe+0x2a9/0x610\n[ 3.362175 ] driver_probe_device+0x90/0x1d0\n[ 3.362175 ] ? mutex_lock_nested+0x1b/0x20\n[ 3.362175 ] device_driver_attach+0x68/0x70\n[ 3.362175 ] __driver_attach+0x124/0x1b0\n[ 3.362175 ] ? device_driver_attach+0x70/0x70\n[ 3.362175 ] bus_for_each_dev+0xbb/0x110\n[ 3.362175 ] ? rdinit_setup+0x45/0x45\n[ 3.362175 ] driver_attach+0x27/0x30\n[ 3.362175 ] bus_add_driver+0x1eb/0x2a0\n[ 3.362175 ] driver_register+0xa9/0x180\n[ 3.362175 ] __pci_register_driver+0x82/0x90\n[ 3.362175 ] ? w6692_init+0x38/0x38\n[ 3.362175 ] nj_init+0x36/0x38\n[ 3.362175 ] do_one_initcall+0x7f/0x3d0\n[ 3.362175 ] ? rdinit_setup+0x45/0x45\n[ 3.362175 ] ? rcu_read_lock_sched_held+0x4f/0x80\n[ 3.362175 ] kernel_init_freeable+0x2aa/0x301\n[ 3.362175 ] ? rest_init+0x2c0/0x2c0\n[ 3.362175 ] kernel_init+0x18/0x190\n[ 3.362175 ] ? rest_init+0x2c0/0x2c0\n[ 3.362175 ] ? rest_init+0x2c0/0x2c0\n[ 3.362175 ] ret_from_fork+0x1f/0x30\n[ 3.362175 ] Kernel panic - not syncing: panic_on_warn set ...\n[ 3.362175 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted\n5.13.0-rc1-00144-g25a1298726e #13\n[ 3.362175 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\nrel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014\n[ 3.362175 ] Call Trace:\n[ 3.362175 ] dump_stack+0xba/0xf5\n[ 3.362175 ] ? free_irq+0x100/0x480\n[ 3.362175 ] panic+0x15a/0x3f2\n[ 3.362175 ] ? __warn+0xf2/0x150\n[ 3.362175 ] ? free_irq+0x100/0x480\n[ 3.362175 ] __warn+0x108/0x150\n[ 3.362175 ] ? free_irq+0x100/0x480\n[ 3.362175 ] report_bug+0x119/0x1c0\n[ 3.362175 ] handle_bug+0x3b/0x80\n[ 3.362175 ] exc_invalid_op+0x18/0x70\n[ 3.362175 ] asm_exc_invalid_op+0x12/0x20\n[ 3.362175 ] RIP: 0010:free_irq+0x100\n---truncated---

See more information about CVE-2021-47284 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle VM version 3 (kernel-uek)	OVMSA-2024-0011	2024-09-03