CVE-2024-26723: lan966x: Fix crash when adding interface under a lag
First published: Wed Apr 03 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: lan966x: Fix crash when adding interface under a lag There is a crash when adding one of the lan966x interfaces under a lag interface. The issue can be reproduced like this: ip link add name bond0 type bond miimon 100 mode balance-xor ip link set dev eth0 master bond0 The reason is because when adding a interface under the lag it would go through all the ports and try to figure out which other ports are under that lag interface. And the issue is that lan966x can have ports that are NULL pointer as they are not probed. So then iterating over these ports it would just crash as they are NULL pointers. The fix consists in actually checking for NULL pointers before accessing something from the ports. Like we do in other places.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.1<6.1.79 | |
| Linux Kernel | >=6.2<6.6.18 | |
| Linux Kernel | >=6.7<6.7.6 | |
| Linux Kernel | =6.8-rc1 | |
| Linux Kernel | =6.8-rc2 | |
| Linux Kernel | =6.8-rc3 | |
| Linux Kernel | =6.8-rc4 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/15faa1f67ab405d47789d4702f587ec7df7ef03e
- https://git.kernel.org/stable/c/2a492f01228b7d091dfe38974ef40dccf8f9f2f1
- https://git.kernel.org/stable/c/48fae67d837488c87379f0c9f27df7391718477c
- https://git.kernel.org/stable/c/b9357489c46c7a43999964628db8b47d3a1f8672
- https://launchpad.net/bugs/cve/CVE-2024-26723
- https://git.kernel.org/linus/15faa1f67ab405d47789d4702f587ec7df7ef03e
- https://security-tracker.debian.org/tracker/CVE-2024-26723
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26723
- https://nvd.nist.gov/vuln/detail/CVE-2024-26723
- https://ubuntu.com/security/CVE-2024-26723
Frequently Asked Questions
What is the severity of CVE-2024-26723?
CVE-2024-26723 is categorized as a high severity vulnerability due to the potential for system crashes.
How do I fix CVE-2024-26723?
To fix CVE-2024-26723, update to the patched versions of the Linux kernel: 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
What is the impact of CVE-2024-26723?
The impact of CVE-2024-26723 includes potential system crashes when adding a lan966x interface under a link aggregation group.
Which Linux distributions are affected by CVE-2024-26723?
CVE-2024-26723 primarily affects Debian-based distributions using the specified kernel versions.
Is there a workaround for CVE-2024-26723?
Currently, there are no official workarounds for CVE-2024-26723; updating the kernel is the recommended action.
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