CVE-2024-53126: vdpa: solidrun: Fix UB bug with devres
In the Linux kernel, the following vulnerability has been resolved:
vdpa: solidrun: Fix UB bug with devres
In psnetopenpfbar() and snetopenvfbar() a string later passed to pcimiomapregions() is placed on the stack. Neither pcimiomapregions() nor the functions it calls copy that string.
Should the string later ever be used, this, consequently, causes undefined behavior since the stack frame will by then have disappeared.
Fix the bug by allocating the strings on the heap through devmkasprintf().
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1 - Configuration
In psnet_open_pf_bar() and psnet_open_vf_bar(), replace the stack-based string allocation used for the string argument later passed to pcim_iomap_regions() with a devm_kasprintf() allocation so the string remains valid beyond the stack frame.
Linux kernel (vdpa: solidrun) Use devres-managed heap allocation for the string passed to pcim_iomap_regions() = Allocate the string on the heap through devm_kasprintf() instead of placing it on the stack
Event History
Frequently Asked Questions
What is the severity of CVE-2024-53126?
CVE-2024-53126 has a medium severity rating due to potential instability caused by the unbounded bug.
How do I fix CVE-2024-53126?
To fix CVE-2024-53126, update the Linux kernel to a version above 6.3 or between 6.6.0 and 6.6.63 or between 6.11.0 and 6.11.10.
What versions of the Linux kernel are affected by CVE-2024-53126?
CVE-2024-53126 affects Linux kernel versions up to 6.3 and versions between 6.6.0 to 6.6.63 and 6.11.0 to 6.11.10.
What components are involved in CVE-2024-53126 vulnerability?
The vulnerability involves the vdpa component and functions like psnet_open_pf_bar() and snet_open_vf_bar() in the Linux kernel.
Is CVE-2024-53126 related to remote code execution?
CVE-2024-53126 does not directly describe remote code execution but may lead to instability in the kernel which could be exploited.