CVE-2024-50169: vsock: Update rx_bytes on read_skb()
First published: Thu Nov 07 2024(Updated: )
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
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.4<6.6.59 | |
| Linux Kernel | >=6.7<6.11.6 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
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Reference Links
- https://git.kernel.org/stable/c/66cd51de31c682a311c2fa25c580b7ea45859dd9
- https://git.kernel.org/stable/c/e5ca2b98090b4bb1c393088c724af6c37812a829
- https://git.kernel.org/stable/c/3543152f2d330141d9394d28855cb90b860091d2
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50169
- https://nvd.nist.gov/vuln/detail/CVE-2024-50169
- https://launchpad.net/bugs/cve/CVE-2024-50169
- https://security-tracker.debian.org/tracker/CVE-2024-50169
- https://ubuntu.com/security/CVE-2024-50169
- https://git.kernel.org/linus/3543152f2d330141d9394d28855cb90b860091d2
Frequently Asked Questions
What is the severity of CVE-2024-50169?
The severity of CVE-2024-50169 is currently classified as moderate.
What systems are affected by CVE-2024-50169?
CVE-2024-50169 affects various versions of the Linux kernel between 6.4 and 6.6.59, as well as specific release candidates of version 6.12.
How do I fix CVE-2024-50169?
To fix CVE-2024-50169, you should update your Linux kernel to a version that includes the patch addressing this vulnerability.
What does CVE-2024-50169 specifically impact?
CVE-2024-50169 specifically impacts the handling of virtual socket operations in the Linux kernel, affecting the update of rx_bytes.
Is CVE-2024-50169 actively being exploited?
As of now, there have been no widespread reports of CVE-2024-50169 being actively exploited in the wild.
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