Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 before 68d459e6e609c31f96a203dd6eec60c634f155e1; affected 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 before 93488ea378b4427598cace558236c110515d743b; affected 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 before a67632c8c2688d6e0091529bcefe54bc5ee80e9b |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.