CVE-2026-72423
HIGHAttack Surface
CVSS Vector Breakdown
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard conntrack opts error writes The conntrack lookup and allocation kfuncs take an opts pointer together with an opts__sz argument. The verifier checks only the memory range described by opts__sz, but the wrappers unconditionally write opts->error whenever the internal lookup or allocation helper returns an error. For an invalid size smaller than the end of opts->error, that write can land outside the verifier-checked range. Keep returning NULL for invalid arguments, but only report the error through opts->error when the supplied size includes the field. This preserves error reporting for the supported 12-byte and 16-byte layouts, and for other invalid sizes that still include opts->error.
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < 6fd973def4d6cb89aaf7e9b6bc26cac977f6da13 |
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < 669bc3b345712112d3f033a1953f5a10b15e7c65 |
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < 63d95c6bbd6fc0e411404188306a1fea456300b0 |
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < 453f4f1e90de55b6bc297936031b68bef93f2e28 |
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < dd74c80203842a21b2ebb9f70d1260d9aa20fa05 |
| Linux | Linux | b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 < 6f6183a39533d727deaa5061cadae6dd9e6744d0 |
| Linux | Linux | 5.18 |