Out-of-bounds read in Linux kernel - CVE-2026-89882
Published: September 17, 2026
Vulnerability identifier: #VU150405
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89882
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read out-of-bounds memory.
The vulnerability exists due to an integer underflow in the HEVC reference picture set prediction handling of the RKVDEC decoder when processing an EXT_SPS_ST_RPS control with INTER_REF_PIC_SET_PRED set. A local user can submit a crafted control with a delta_idx_minus1 value that causes the reference picture set index to underflow to read out-of-bounds memory.
The affected decoder is accessible through the V4L2 memory-to-memory interface.
Affected software
Linux kernel
How to mitigate CVE-2026-89882
Install security update from vendor's repository.