Bug 2324410 (CVE-2024-50169) - CVE-2024-50169 kernel: vsock: Update rx_bytes on read_skb()
Summary: CVE-2024-50169 kernel: vsock: Update rx_bytes on read_skb()
Keywords:
Status: NEW
Alias: CVE-2024-50169
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2324461
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-11-07 17:01 UTC by OSIDB Bzimport
Modified: 2025-05-13 08:33 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:6966 0 None None None 2025-05-13 08:33:26 UTC

Description OSIDB Bzimport 2024-11-07 17:01:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

vsock: Update rx_bytes on read_skb()

Make sure virtio_transport_inc_rx_pkt() and virtio_transport_dec_rx_pkt()
calls are balanced (i.e. virtio_vsock_sock::rx_bytes doesn't lie) after
vsock_transport::read_skb().

While here, also inform the peer that we've freed up space and it has more
credit.

Failing to update rx_bytes after packet is dequeued leads to a warning on
SOCK_STREAM recv():

[  233.396654] rx_queue is empty, but rx_bytes is non-zero
[  233.396702] WARNING: CPU: 11 PID: 40601 at net/vmw_vsock/virtio_transport_common.c:589
Comment 1 Robb Gatica 2024-11-07 19:47:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024110749-CVE-2024-50169-9df5@gregkh/T
Comment 2 errata-xmlrpc 2025-05-13 08:33:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6966 https://access.redhat.com/errata/RHSA-2025:6966
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