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A heap buffer overflow (out-of-bounds write followed by out-of-bounds read) was found in libaom, the reference AV1 codec implementation by the Alliance for Open Media. The vulnerability exists in the AV1 encoder when an application sets g_lag_in_frames = 1. The wrap-around guard for the first-pass stats ring buffer in update_firstpass_stats() (av1/encoder/firstpass.c) only fires when cpi->oxcf.pass == AOM_RC_FIRST_PASS, but Look-Ahead Processing (LAP) mode (enabled when g_lag_in_frames >= 1) runs as AOM_RC_ONE_PASS. As a result, the stats_in_end pointer is never wrapped and every frame after the second writes a 232-byte FIRSTPASS_STATS structure past the allocated 2-entry buffer, corrupting adjacent heap objects and their aom_memalign metadata. Impact: Heap out-of-bounds write of 232-byte FIRSTPASS_STATS entries (29 fields of attacker-influenced floating-point/integer data) into the adjacent heap on every encoder frame after the 2nd, out-of-bounds read in find_next_scenecut(), and process crash via corrupted free() metadata in aom_codec_destroy(). Reachable from any application that exposes encoder configuration to untrusted input (e.g. transcoding services, browsers using libaom for WebRTC encode). Affected: libaom v2.0.0 (first release shipping LAP support, commits 5517b28e1e and 4be6511843, Dec 2019) through v3.13.3 Fixed in: v3.14.0 by commit 243f8ae84b ("Handle buffer pointer in LAP mode to avoid overflow", BUG=aomedia:504317456, 2026-04-20) Upstream report: https://issues.chromium.org/issues/504317456 (restricted) Reporter: The FuzzAnything Team PSIRT Ticket: PSIRTSUPT-17176
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:47105 https://access.redhat.com/errata/RHSA-2026:47105
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:47104 https://access.redhat.com/errata/RHSA-2026:47104
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:54180 https://access.redhat.com/errata/RHSA-2026:54180
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:54185 https://access.redhat.com/errata/RHSA-2026:54185
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:54181 https://access.redhat.com/errata/RHSA-2026:54181
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Via RHSA-2026:54182 https://access.redhat.com/errata/RHSA-2026:54182
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Via RHSA-2026:54259 https://access.redhat.com/errata/RHSA-2026:54259
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:54249 https://access.redhat.com/errata/RHSA-2026:54249
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2026:54248 https://access.redhat.com/errata/RHSA-2026:54248
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:54339 https://access.redhat.com/errata/RHSA-2026:54339