CVE-2021-47124

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47124
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] io_put_req fs/io_uring.c:2140 [inline] io_queue_linked_timeout fs/io_uring.c:6300 [inline] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [inline] io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_link_timeout_fn() should put only one reference of the linked timeout request, however in case of racing with the master request's completion first io_req_complete() puts one and then io_put_req_deferred() is called.

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/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 Patch
https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff Patch
https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 Patch
https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 Patch
https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 Patch
https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 Patch
https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff Patch
https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 Patch
https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 Patch
https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 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:5.13:rc1:*:*:*:*:*:*
History

13 Mar 2025, 19:35

Type Values Removed Values Added
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 - () https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 - Patch
References () https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff - () https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff - Patch
References () https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 - () https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 - Patch
References () https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 - () https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 - Patch
References () https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 - () https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux

21 Nov 2024, 06:35

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: corrige las referencias de tiempo de espera del enlace ADVERTENCIA: CPU: 0 PID: 10242 en lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010: refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Seguimiento de llamadas: __refcount_sub_and_test include/linux/refcount.h:283 [en línea] __refcount_dec_and_test include/linux/refcount.h:315 [en línea] refcount_dec_and_test include/linux/refcount.h: 333 [en línea] io_put_req fs/io_uring.c:2140 [en línea] io_queue_linked_timeout fs/io_uring.c:6300 [en línea] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [en línea] io_submit _sqes +0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [en línea] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_link_timeout_fn() debe poner solo una referencia de la solicitud de tiempo de espera vinculada, sin embargo en En el caso de competir con la finalización de la solicitud maestra, primero io_req_complete() coloca uno y luego se llama a io_put_req_deferred().
References () https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 - () https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 -
References () https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff - () https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff -
References () https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 - () https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 -
References () https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 - () https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 -
References () https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 - () https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 -

15 Mar 2024, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-03-15 21:15

Updated : 2025-03-13 19:35

NVD link : CVE-2021-47124

Mitre link : CVE-2021-47124

CVE.ORG link : CVE-2021-47124

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo