Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix potential UAF/KASAN warning Currently, trace_cachefiles_coherency() is being passed a pointer to a __be64 lain over the coherency data in struct cachefiles_xattr so that it can display the first 8 bytes. However, the data is of variable length and could even be 0 bytes. This could lead to a UAF or KASAN warning. Fix this by making sure the buffer has room for at least 8 bytes and that those 8 bytes are pre-cleared. Further, those bytes are not 8-byte aligned, so fix the tracepoint to extract the data as four 2-byte words (they are 2-byte aligned) and reassemble the __be64. The compiler will convert this into a single 8-byte load where the CPU supports it.
References
- https://git.kernel.org/stable/c/68d459e6e609c31f96a203dd6eec60c634f155e1
- https://git.kernel.org/stable/c/93488ea378b4427598cace558236c110515d743b
- https://git.kernel.org/stable/c/a67632c8c2688d6e0091529bcefe54bc5ee80e9b
FAQ
What is CVE-2026-98117?
CVE-2026-98117 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix potential UAF/KASAN warning Currently, trace_cachefiles_coherency() is being passed a pointer to a __be64 lain ove...
How severe is CVE-2026-98117?
CVSS scoring is not yet available for CVE-2026-98117. Check NVD for updates.
Is there a patch for CVE-2026-98117?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.