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CVE-2026-74720

Unknown

Last modified

CVE-2026-74720 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). 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
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74720?
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.
How severe is CVE-2026-74720?
Severity scoring for CVE-2026-74720 is pending analysis.
How do I fix CVE-2026-74720?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST