CVE-2021-47153

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47153
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports interrupts, setting the KILL bit in a attempt to recover from a timed out transaction triggers an interrupt. Unfortunately, the interrupt handler (i801_isr) is not prepared for this situation and will try to process the interrupt as if it was signaling the end of a successful transaction. In the case of a block transaction, this can result in an out-of-range memory access. This condition was reproduced several times by syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79 So disable interrupts while trying to reset the bus. Interrupts will be enabled again for the following transaction.

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b Patch
https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 Patch
https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a Patch
https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef Patch
https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c Patch
https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 Patch
https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b Patch
https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 Patch
https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b Patch
https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 Patch
https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a Patch
https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef Patch
https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c Patch
https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 Patch
https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b Patch
https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
History

16 Sep 2025, 16:24

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b - () https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b - Patch
References () https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 - () https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 - Patch
References () https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a - () https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a - Patch
References () https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef - () https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef - Patch
References () https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c - () https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c - Patch
References () https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 - () https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 - Patch
References () https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b - () https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b - Patch
References () https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 - () https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*
CVSS v2 : unknown
v3 : 6.0 		v2 : unknown
v3 : 7.1
CWE CWE-125

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b - () https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b -
References () https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 - () https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3 -
References () https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a - () https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a -
References () https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef - () https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef -
References () https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c - () https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c -
References () https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 - () https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6 -
References () https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b - () https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b -
References () https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 - () https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629 -

05 Nov 2024, 17:35

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.0

25 Mar 2024, 13:47

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: i801: no genera una interrupción al restablecer el bus Ahora que el controlador i2c-i801 admite interrupciones, configurar el bit KILL en un intento de recuperarse de una transacción con tiempo de espera agotado se activa una interrupción. Desafortunadamente, el controlador de interrupciones (i801_isr) no está preparado para esta situación e intentará procesar la interrupción como si estuviera indicando el final de una transacción exitosa. En el caso de una transacción en bloque, esto puede resultar en un acceso a la memoria fuera de rango. Esta condición fue reproducida varias veces por syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug ?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b 4d3fd1dfd53e90afd79 Entonces deshabilite las interrupciones al intentar restablecer el bus. Las interrupciones se habilitarán nuevamente para la siguiente transacción.

25 Mar 2024, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-03-25 09:15

Updated : 2025-09-16 16:24

NVD link : CVE-2021-47153

Mitre link : CVE-2021-47153

CVE.ORG link : CVE-2021-47153

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-125

Out-of-bounds Read