CVE-2026-97580
Received Received - Intake

Heap Overflow in Linux Kernel HEVC Decoder

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: media: rkvdec: bound HEVC tile loops and PPS id to the array capacity compute_tiles_uniform() and compute_tiles_non_uniform() loop over num_tile_columns_minus1 + 1 / num_tile_rows_minus1 + 1 entries, and assemble_hw_pps() writes one COLUMN_WIDTH / ROW_HEIGHT register per tile and indexes priv_tbl->param_set[] by pic_parameter_set_id, all taken from the untrusted PPS. Use the bounded v4l2_hevc_pps_num_tile_columns() / v4l2_hevc_pps_num_tile_rows() helpers for the tile loops, and bail out of assemble_hw_pps() before indexing priv_tbl->param_set[] with an out-of-range pic_parameter_set_id, so the writes stay within the hardware tables.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-97580
EUVD
EUVD-2026-86888

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves improper bounds checking in the Rockchip Video Decoder (rkvdec) driver when handling HEVC (H.265) video streams. Specifically, functions compute_tiles_uniform() and compute_tiles_non_uniform() loop over tile columns and rows without proper validation, and assemble_hw_pps() writes to hardware registers using untrusted data from the Picture Parameter Set (PPS). This could lead to out-of-bounds writes in hardware tables.

Detection Guidance

This vulnerability is specific to the Linux kernel's media subsystem, particularly the rkvdec driver handling HEVC video decoding. Detection requires checking kernel logs for related errors or kernel crashes during HEVC video processing. Commands like dmesg | grep -i rkvdec or journalctl -k | grep -i rkvdec may help identify issues. Ensure your kernel version is up to date and review patches applied.

Impact Analysis

If exploited, this vulnerability could allow an attacker to cause memory corruption or execute arbitrary code in the kernel, potentially leading to system crashes, privilege escalation, or unauthorized access. Users running vulnerable Linux kernels with the rkvdec driver could be affected if malicious HEVC video files are processed.

Mitigation Strategies

Immediately update your Linux kernel to the latest stable version that includes the fix for this vulnerability. If updating is not immediately possible, consider disabling the rkvdec driver or restricting access to HEVC video decoding until the patch is applied. Monitor vendor advisories for kernel updates.

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