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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 to < 68d459e6e609c31f96a203dd6eec60c634f155e1affected229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 to < 93488ea378b4427598cace558236c110515d743baffected229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 to < a67632c8c2688d6e0091529bcefe54bc5ee80e9baffected
Linux Linux
Default version status: affected
6.14affected0 to < 6.14unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected