static uint8_t adts_fixed_header(adts_header *adts, bitfile *ld)
{
    uint16_t i;
    uint8_t sync_err = 1;

    /* try to recover from sync errors */
    for (i = 0; i < 768; i++)
    {
        adts->syncword = (uint16_t)faad_showbits(ld, 12);
        if (adts->syncword != 0xFFF)
        {
            faad_getbits(ld, 8
                DEBUGVAR(0,0,""));
        } else {
            sync_err = 0;
            faad_getbits(ld, 12
                DEBUGVAR(1,118,"adts_fixed_header(): syncword"));
            break;
        }
    }
    if (sync_err)
        return 5;

    adts->id = faad_get1bit(ld
        DEBUGVAR(1,119,"adts_fixed_header(): id"));
    adts->layer = (uint8_t)faad_getbits(ld, 2
        DEBUGVAR(1,120,"adts_fixed_header(): layer"));
    adts->protection_absent = faad_get1bit(ld
        DEBUGVAR(1,121,"adts_fixed_header(): protection_absent"));
    adts->profile = (uint8_t)faad_getbits(ld, 2
        DEBUGVAR(1,122,"adts_fixed_header(): profile"));
    adts->sf_index = (uint8_t)faad_getbits(ld, 4
        DEBUGVAR(1,123,"adts_fixed_header(): sf_index"));
    adts->private_bit = faad_get1bit(ld
        DEBUGVAR(1,124,"adts_fixed_header(): private_bit"));
    adts->channel_configuration = (uint8_t)faad_getbits(ld, 3
        DEBUGVAR(1,125,"adts_fixed_header(): channel_configuration"));
    adts->original = faad_get1bit(ld
        DEBUGVAR(1,126,"adts_fixed_header(): original"));
    adts->home = faad_get1bit(ld
        DEBUGVAR(1,127,"adts_fixed_header(): home"));

    if (adts->old_format == 1)
    {
        /* Removed in corrigendum 14496-3:2002 */
        if (adts->id == 0)
        {
            adts->emphasis = (uint8_t)faad_getbits(ld, 2
                DEBUGVAR(1,128,"adts_fixed_header(): emphasis"));
        }
    }

    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.