CVEvulnerability
CVE-2026-74720
7.8 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-08-22
- Last modified
- 2026-10-16
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
- https://git.kernel.org/stable/c/29c239f8dbec5ab33a61796724d189bddee6cd4b git.kernel.org
- https://git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e git.kernel.org
- https://git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472 git.kernel.org
- https://git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf git.kernel.org
- https://git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86 git.kernel.org
- https://git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c git.kernel.org
- https://git.kernel.org/stable/c/db6382ed3361bdd8129572a3423956cba1dae829 git.kernel.org
- https://git.kernel.org/stable/c/eaffa1495e4fe6330aeff9f323ea3d48b01f118a git.kernel.org