Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix wrong reg type conversion in release_reference() Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release these memories by calling the corresponding helper functions. When a resource is released, all pointer registers corresponding to the resource should be invalidated. The verifier use release_references() to do this job, by apply __mark_reg_unknown() to each relevant register. It will give these registers the type of SCALAR_VALUE. A register that will contain a pointer value at runtime, but of type SCALAR_VALUE, which may allow the unprivileged user to get a kernel pointer by storing this register into a map. Using __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this problem.
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
fd978bf7fd312581a7ca454a991f0ffb34c4204b to < cedd4f01f67be94735f15123158f485028571037affectedfd978bf7fd312581a7ca454a991f0ffb34c4204b to < 466ce46f251dfb259a8cbaa895ab9edd6fb56240affectedfd978bf7fd312581a7ca454a991f0ffb34c4204b to < ae5ccad6c711db0f2ca1231be051935dd128b8f5affectedfd978bf7fd312581a7ca454a991f0ffb34c4204b to < f1db20814af532f85e091231223e5e4818e8464baffected
Linux Linux
Default version status: affected
4.20affected0 to < 4.20unaffected5.10.155 to ≤ 5.10.*unaffected5.15.79 to ≤ 5.15.*unaffected6.0.9 to ≤ 6.0.*unaffected6.1 to ≤ *unaffected