# CVE-2026-31690: linux: In the Linux kernel, the following vulnerability has been resolved:  firmware: thead: Fix buffer overflow and use sta...

CVE-2026-31690 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31690 (version 6.19.13-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31690
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 27, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  firmware: thead: Fix buffer overflow and use standard endian macros  Addresses two issues in the TH1520 AON firmware protocol driver:  1. Fix a potential buffer overflow where the code used unsafe pointer    arithmetic to access the 'mode' field through the 'resource' pointer    with an offset. This was flagged by Smatch static checker as:    "buffer overflow 'data' 2 <= 3"  2. Replace custom RPC_SET_BE* and RPC_GET_BE* macros with standard    kernel endianness conversion macros (cpu_to_be16, etc.) for better    portability and maintainability.  The functionality was re-tested with the GPU power-up sequence, confirming the GPU powers up correctly and the driver probes successfully.  [   12.702370] powervr ffef400000.gpu: [drm] loaded firmware powervr/rogue_36.52.104.182_v1.fw [   12.711043] powervr ffef400000.gpu: [drm] FW version v1.0 (build 6645434 OS) [   12.719787] [drm] Initialized powervr 1.0.0 for ffef400000.gpu on minor 0

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.13-1 | [DEBIAN-CVE-2026-31690](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31690.md) | May 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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