CVE-2026-93079
cxl/features: Reject Get Feature count larger than the output buffer
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: cxl/features: Reject Get Feature count larger than the output buffer cxlctl_get_feature() sizes its output buffer from the user's fwctl_rpc.out_len, but the device is told to write cxl_mbox_get_feat_in.count bytes into rpc_out->payload, which is a separate user-controlled value. Nothing bounds count against out_len, so a small out_len with a large count overflows the kvzalloc()'d buffer. A heap OOB write reachable from FWCTL_RPC. Reject requests where count exceeds the available payload room, before allocating.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
5908f3ed6dc209e5c824e63afda7545805f75a7e < 3f02031a0a53de0d3ef066c92d0486b2b11be40c 5908f3ed6dc209e5c824e63afda7545805f75a7e < 329ea475581c647a680a6937e353c1a6e2534b40 5908f3ed6dc209e5c824e63afda7545805f75a7e < 4bf6bac375076ced2fa4b3fef8739bd985f93456
Linux / Linux
6.15