Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer state for commuted arithmetic When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields. Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.
References8
- git.kernel.org/stable/c/29c239f8dbec5ab33a61796724d189bddee6cd4b
- git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e
- git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472
- git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf
- git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86
- git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c
- git.kernel.org/stable/c/db6382ed3361bdd8129572a3423956cba1dae829
- git.kernel.org/stable/c/eaffa1495e4fe6330aeff9f323ea3d48b01f118a
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.