Out-of-bounds read in Linux kernel - CVE-2026-31747
Published: May 2, 2026
Vulnerability identifier: #VU128948
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31747
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in me4000_xilinx_download() when parsing a crafted firmware file. A local user can supply a specially crafted firmware file to cause a denial of service.
The issue occurs because the function reads a length value from the first 4 bytes of the firmware and then reads data from offset 16 onward without ensuring the supplied firmware is large enough to contain the declared data stream.
How to mitigate CVE-2026-31747
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655
- https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7
- https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2
- https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6
- https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5
- https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d
- https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38
- https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561