CVE-2026-74720

HighCVSS 7.8/10Last modified Oct 16, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < 86b203aadc2930e0a4f9c6277b5b80ff3664c472; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < 8109c25e0c41f5f19a1c2380bb49c991a877494e; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < d1959028190a7649b926f5867a58de5fe221b23c; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < 8cb23101a3fcc7432b451ea3d0f14a90711f4acf; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < 29c239f8dbec5ab33a61796724d189bddee6cd4b; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < db6382ed3361bdd8129572a3423956cba1dae829; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < eaffa1495e4fe6330aeff9f323ea3d48b01f118a; >= f4d7e40a5b7157e1329c3c5b10f60d8289fc2941, < a4c6f804b44c5c790269b25e0e61cf4e9f117c86
LinuxLinux4.16

References

Timeline

Published
Aug 22, 2026
Last modified
Oct 16, 2026
NVD status
Received

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