// For flags

CVE-2021-47024

vsock/virtio: free queued packets when closing socket

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved:

vsock/virtio: free queued packets when closing socket

As reported by syzbot [1], there is a memory leak while closing the
socket. We partially solved this issue with commit ac03046ece2b
("vsock/virtio: free packets during the socket release"), but we
forgot to drain the RX queue when the socket is definitely closed by
the scheduled work.

To avoid future issues, let's use the new virtio_transport_remove_sock()
to drain the RX queue before removing the socket from the af_vsock lists
calling vsock_remove_sock().

[1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: vsock/virtio: paquetes libres en cola al cerrar el socket SegĂșn lo informado por syzbot [1], hay una pĂ©rdida de memoria al cerrar el socket. Resolvimos parcialmente este problema con el compromiso ac03046ece2b ("vsock/virtio: paquetes libres durante el lanzamiento del socket"), pero nos olvidamos de vaciar la cola RX cuando el trabajo programado cierra definitivamente el socket. Para evitar problemas futuros, usemos el nuevo virtio_transport_remove_sock() para drenar la cola RX antes de eliminar el socket de las listas af_vsock llamando a vsock_remove_sock(). [1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9

*Credits: N/A
CVSS Scores
Attack Vector
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Attack Complexity
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Scope
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Confidentiality
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Integrity
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* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-27 CVE Reserved
  • 2024-02-28 CVE Published
  • 2024-12-17 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
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>= 5.2 < 5.10.37
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.2 < 5.10.37"
en
Affected
Linux
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Linux Kernel
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>= 5.2 < 5.11.21
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.2 < 5.11.21"
en
Affected
Linux
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Linux Kernel
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>= 5.2 < 5.12.4
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en
Affected
Linux
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Linux Kernel
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>= 5.2 < 5.13
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en
Affected
Linux
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Linux Kernel
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4.9.179
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en
Affected
Linux
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Linux Kernel
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4.14.122
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en
Affected
Linux
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Linux Kernel
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4.19.46
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en
Affected
Linux
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Linux Kernel
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5.0.19
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en
Affected
Linux
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Linux Kernel
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5.1.5
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en
Affected