The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
| Link | Tags |
|---|---|
| https://github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cb | third party advisory patch |
| https://security.netapp.com/advisory/ntap-20211229-0005/ | third party advisory |
| http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html | vdb entry third party advisory |