CVE-2021-47457

CVE Details

Release Date:2024-05-22

Description


In the Linux kernel, the following vulnerability has been resolved:\ncan: isotp: isotp_sendmsg(): add result check for wait_event_interruptible()\nUsing wait_event_interruptible() to wait for complete transmission,\nbut do not check the result of wait_event_interruptible() which can be\ninterrupted. It will result in TX buffer has multiple accessors and\nthe later process interferes with the previous process.\nFollowing is one of the problems reported by syzbot.\n=============================================================\nWARNING: CPU: 0 PID: 0 at net/can/isotp.c:840 isotp_tx_timer_handler+0x2e0/0x4c0\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc7+ #68\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 04/01/2014\nRIP: 0010:isotp_tx_timer_handler+0x2e0/0x4c0\nCall Trace:\n\n? isotp_setsockopt+0x390/0x390\n__hrtimer_run_queues+0xb8/0x610\nhrtimer_run_softirq+0x91/0xd0\n? rcu_read_lock_sched_held+0x4d/0x80\n__do_softirq+0xe8/0x553\nirq_exit_rcu+0xf8/0x100\nsysvec_apic_timer_interrupt+0x9e/0xc0\n\nasm_sysvec_apic_timer_interrupt+0x12/0x20\nAdd result check for wait_event_interruptible() in isotp_sendmsg()\nto avoid multiple accessers for tx buffer.

See more information about CVE-2021-47457 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


PlatformErrataRelease Date
Oracle Linux version 9 (kernel)ELSA-2024-93152024-11-14


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