Out-of-bounds read in Linux kernel - CVE-2026-80604
Published: August 28, 2026
Vulnerability identifier: #VU146274
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80604
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in hid_get_report in drivers/hid/hid-core.c when processing a numbered report with a zero-length data buffer. A local attacker can trigger hid_report_raw_event() with size 0 to cause a denial of service.
The issue occurs because the report ID is read from data[0] before validating that the buffer contains at least one byte.
Affected software
Linux kernel
How to mitigate CVE-2026-80604
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/30ff978af92cb51c9ba99f96fc4f4ac80d7001ba
- https://git.kernel.org/stable/c/af1a9b65ebe8a948eda805c14b78d4d0767cb1b5
- https://git.kernel.org/stable/c/c1fc0d3aff26ec9ff885b3e4c92eba98cf349678
- https://git.kernel.org/stable/c/c39f5765ad840b71ff8db812d0210f216cca96e4
- https://git.kernel.org/stable/c/c973d53bcd420b58c4a34c68198746286d77e9fa
- https://git.kernel.org/stable/c/dd395744e4ed87956fcbf81ecc6a20c51e35fa4e
- https://git.kernel.org/stable/c/f7e8117e42b20c30d2a5edab82c944a5e381d791
- https://git.kernel.org/stable/c/f8896b684e246f3f00f45ba2b6803ae59b9cc768