CVE-2021-47024
Fortanix Virtio Vsock RX Queue Drainage Memory Leak
Description
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
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
Dec. 6, 2024, 8:53 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected kernel packages.
- Reboot the system to apply the updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47024.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47024 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47024
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47024 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47024 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Dec. 06, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.10.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.21 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.4 Changed Reference Type https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a No Types Assigned https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a Patch Changed Reference Type https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a No Types Assigned https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a Patch Changed Reference Type https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b No Types Assigned https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b Patch Changed Reference Type https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b No Types Assigned https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b Patch Changed Reference Type https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 No Types Assigned https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 Patch Changed Reference Type https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 No Types Assigned https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 Patch Changed Reference Type https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf No Types Assigned https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf Patch Changed Reference Type https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf No Types Assigned https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a Added Reference https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b Added Reference https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 Added Reference https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 28, 2024
Action Type Old Value New Value Added Description 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 Added Reference Linux https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39 [No types assigned]