CVE-2021-47457

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47457
In the Linux kernel, the following vulnerability has been resolved: can: isotp: isotp_sendmsg(): add result check for wait_event_interruptible() Using wait_event_interruptible() to wait for complete transmission, but do not check the result of wait_event_interruptible() which can be interrupted. It will result in TX buffer has multiple accessors and the later process interferes with the previous process. Following is one of the problems reported by syzbot. ============================================================= WARNING: CPU: 0 PID: 0 at net/can/isotp.c:840 isotp_tx_timer_handler+0x2e0/0x4c0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc7+ #68 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 04/01/2014 RIP: 0010:isotp_tx_timer_handler+0x2e0/0x4c0 Call Trace: <IRQ> ? isotp_setsockopt+0x390/0x390 __hrtimer_run_queues+0xb8/0x610 hrtimer_run_softirq+0x91/0xd0 ? rcu_read_lock_sched_held+0x4d/0x80 __do_softirq+0xe8/0x553 irq_exit_rcu+0xf8/0x100 sysvec_apic_timer_interrupt+0x9e/0xc0 </IRQ> asm_sysvec_apic_timer_interrupt+0x12/0x20 Add result check for wait_event_interruptible() in isotp_sendmsg() to avoid multiple accessers for tx buffer.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 Patch
https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 Patch
https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 Patch
https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 Patch
https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 Patch
https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*
History

29 Sep 2025, 16:44

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE NVD-CWE-noinfo
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 - () https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 - Patch
References () https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 - () https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 - Patch
References () https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 - () https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 - Patch
CPE cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*

21 Nov 2024, 06:36

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 - () https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64 -
References () https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 - () https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8 -
References () https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 - () https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110 -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: isotp: isotp_sendmsg(): agregar verificación de resultado para wait_event_interruptible() Usar wait_event_interruptible() para esperar la transmisión completa, pero no verificar el resultado de wait_event_interruptible() que puede ser interrumpido. Dará como resultado que el búfer TX tenga múltiples accesos y el proceso posterior interfiera con el proceso anterior. El siguiente es uno de los problemas informados por syzbot. ==================================================== =========== ADVERTENCIA: CPU: 0 PID: 0 en net/can/isotp.c:840 isotp_tx_timer_handler+0x2e0/0x4c0 CPU: 0 PID: 0 Comm: swapper/0 No contaminado 5.13.0 -rc7+ #68 Nombre del hardware: PC estándar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 01/04/2014 RIP: 0010:isotp_tx_timer_handler+0x2e0/0x4c0 Seguimiento de llamadas: ? isotp_setsockopt+0x390/0x390 __hrtimer_run_queues+0xb8/0x610 hrtimer_run_softirq+0x91/0xd0 ? rcu_read_lock_sched_held+0x4d/0x80 __do_softirq+0xe8/0x553 irq_exit_rcu+0xf8/0x100 sysvec_apic_timer_interrupt+0x9e/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 Agregar verificación de resultado para wait_event_ interrumpible() en isotp_sendmsg() para evitar múltiples accesos al búfer tx.

22 May 2024, 07:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-22 07:15

Updated : 2025-09-29 16:44

NVD link : CVE-2021-47457

Mitre link : CVE-2021-47457

CVE.ORG link : CVE-2021-47457

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo