Bug 2454818 (CVE-2026-31401)

Summary: CVE-2026-31401 kernel: HID: bpf: prevent buffer overflow in hid_hw_request
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's Human Interface Device (HID) BPF (Berkeley Packet Filter) component. This vulnerability occurs in the `hid_hw_request` function, where an uncontrolled return value from `dispatch_hid_bpf_raw_requests()` can lead to a buffer overflow. This could allow a local attacker to cause memory corruption, potentially leading to a denial of service or information disclosure.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-04-03 16:02:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

HID: bpf: prevent buffer overflow in hid_hw_request

right now the returned value is considered to be always valid. However,
when playing with HID-BPF, the return value can be arbitrary big,
because it's the return value of dispatch_hid_bpf_raw_requests(), which
calls the struct_ops and we have no guarantees that the value makes
sense.
Comment 1 Jon Moroney 2026-04-03 18:59:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040327-CVE-2026-31401-697d@gregkh/T