CVE-2026-93077

cxl/features: Clamp Get Feature output size to the remaining buffer

N/A
Published: September 17, 2026 at 04:10 PM UTC
Updated: October 19, 2026 at 10:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5e5ac21f629de796ab5d598b59c5e468c6fe4f956.15
Vendor states this is fixed in 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83 (fixed)
Vendor states this is fixed in b8abbd5c2928fd839dab702244cc57b228ab43aa (fixed)
Vendor states this is fixed in ca95b15a0760e7724e61addbdd61050be13b6406 (fixed)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.18.52 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Quick Info

StatusRECEIVED

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